Lost my ethereum

Hello hope someone has a idea, So in 2017-18-19 somewhere in this years I buy around 20 ethereum on a website the money goes from my bank account and it showed me on the website the ethereum and the transaction number. So after that I didn’t figure it out to put it in my wallet so I left it there and forget about it. (Yeah I know pretty dumb) I also deleted all old emails in my account where the mail probably was with the transaction. Is there a little chance maybe how to find it back? Hope u guys have a idea, I would be very grateful for every advice. :)