
A faulty item is not a favour a seller does for you. It is a failure of the contract, and you hold a right to a remedy. Which remedy, and how long the window stays open, depends on where you live, so read the steps below as the shape of the process rather than a fixed count of days.
A claim is only as strong as the paper behind it. Gather the receipt or order confirmation, the delivery note, the bank or card statement showing the payment, and photographs or a short video of the fault. Screenshot the product description that promised a quality the item does not have, because listings get edited once complaints start arriving.
Write down what went wrong, when you first noticed it, and how you have used the item. If a seller later argues that you damaged it through misuse, a dated note written while the memory is fresh carries more weight than a reconstruction assembled months later.
Store it all in one place, in an email folder or a notes app you actually use. The moment your evidence is spread across messages, a deleted photo and a memory, the trail gets patchy, and a seller only needs one gap to cast doubt on the whole account. If you paid in instalments or through a third party, note who received the money, because the claim runs against the party that sold to you.
Ask in the order the law usually prefers, because a seller can often pick the cheaper option. Repair comes first for many faults. Replacement follows when repair is impossible or dragging on. A refund is the fallback when neither works. In some countries you can reject the goods outright and demand your money back inside a short early window, and after that window you get pushed towards repair or replacement.
Say which remedy you want and why the alternatives do not suit you. If a repair would take six weeks and you need the item daily, put that in writing. A reasoned request moves faster than a demand with no explanation attached.
Early in the life of a product, the law in many countries assumes the fault was present when you bought it. The seller has to show you caused it, not the other way round. That assumption fades after a set period, and from then on you may need evidence that the item was defective rather than worn out.
Keep your language plain when you raise it. You do not need to quote a statute. State what you bought, when, what is broken, what you want, and by what date.
Longevity claims are harder to argue. A washing machine that dies after four years is not automatically the retailer's problem, but if a reasonable person would expect it to last far longer, you may still claim a partial refund that reflects the use you already had from it. This is where an independent engineer's report earns its keep.
Statutory periods and the names of the bodies that enforce them differ by country. Ask your national consumer body for the current rule rather than trusting a number you read online.
Keep a repair report even when you have no immediate plans to use it. If a technician tells you which part failed, write down the part name and the date of the inspection. Sellers answer specifics such as a failed drum bearing far better than a general complaint that the machine stopped working, and a named failure is much harder to dismiss as ordinary wear. Ask for that report in writing and pay for it only if you need to, since a seller who accepts the point will not demand one.
Phone calls vanish. Send your complaint by email or through the seller's contact form and keep a copy of everything you send. State the purchase date, the fault, the remedy you want, and a deadline for a reply. Two weeks is a workable figure in many places, so confirm what your local rules allow before you set it.
If the first reply is a refusal, do not start again from scratch. Reply on the same thread, restate the point in two lines, and ask for the decision to be reviewed by a manager. If that fails, the next rungs are your payment provider, then the ombudsman or regulator that covers your country and that industry, then a small claims court.
Do not open a second complaint while the deadline on the first is still running. Two live threads look like disorganisation and give a large company a reason to close both. If the deadline passes in silence, send a short follow up on the same thread, note that the deadline has lapsed, and state plainly what you will do next.