Freeze the record before anything moves
Copy the whole row before editing or deleting anything: item ID, the wrapped address exactly as written, the rebuilt address, the title, the size, the price, and the date you first saw it. Once a cell is overwritten, the original wording is gone for good.
Keep the wrapper even though it no longer answers. It is what the platform issued you, and it is what any comparison starts from. Your rebuilt address belongs beside it in the row, not in place of it. Two addresses on one line look untidy and read perfectly.
Timestamp everything in one format. Plain dates are fine and period labels are fine, but pick one and use it everywhere. Two formats in one column make a timeline harder to read than the evidence deserves, and a dispute is usually an argument about dates.
Collect what proves the order
Four kinds of material carry an order: what you were shown, what you agreed to, what you paid, and what happened next. Keep the listing page as it looked, the order confirmation, the payment record, and the messages that followed. The answer on paid orders that never shipped walks through the states such an order can be in.
Screenshots and text both earn their place. Save the page text because it can be copied and quoted; save the image because it settles questions about wording and layout. Name each file with a date so the pile stays in order.
Where a record came from a check run here, note the period label as well as the date. The weekly snapshots keep that label on every row they publish, and a period label is easier to match than a paragraph of description.
Send it through the right channel
Send the material through the channel the receiving party actually publishes, and keep a copy of what you sent. A message to an operation that no longer answers is not a step forward, and the platform ledger states which platforms are recorded as taking orders.
Write short. One order, one page, one list of dates, one ask. A wall of unlabelled screenshots gets read last, if it gets read at all, and whoever opens it is deciding something faster than you would like. Put the ask at the top rather than at the bottom.
Where the problem is with the record rather than an order, such as a wrong status, a stale date or a figure that does not match its source, the site record page logs what changed and when, so a correction left there stays traceable.
Undo the steps that can be undone
Some damage reverses. A deleted row can come back from a backup. A cell overwritten by mistake can be restored from the copy you froze. A rebuilt address can be generated again from the wrapper, which is one more reason not to throw it away.
Other steps have no way back: an order sent with the wrong size, a message naming the wrong item, a seller contacted on a channel you cannot quote afterwards. Sort your list into those two piles before spending a day on either of them.
After that, leave the frozen copy alone. Adding a new dated line is fine and often useful. Rewriting an old line turns a record into an argument, and the argument is the part that costs you the time you were trying to save.