Hi and welcome.
The problems you're facing are what a lot of crypto bros have to deal with nowadays, especially the ones that have been around since before 2016. There's no way for these people to be able to collect every transfer they've ever done, or anything at all for that matter, banks know that and banks are annoyed by that too, at least the people who work there. I've been personally told by compliance department employees that what they ask for is plain retarded.
What you have obtained legally is not so legal, that's how regulators see it. It is your fault for not︀ saving everything. I know that's absurd, I've been in the same position as you not︁ too long ago.
You don't need a receipt of a wire transfer, 10 years ago︂ things weren't like they are today and even if you bought something using a transfer︃ 10 years ago, the only exchange that's still standing from back then is Bitstamp.
What you need is a source of how you made the coins, say for example, you︄ sold a painting and got paid for it, or maybe you sold a pdf file︅ on how to get rich. That's it. That's the only solution you can go with,︆ to make stuff up.
