Hi,
i desperately need some help:

i bought the Erc20 token XDCE in 2019 on an exchange and hold it there until a week ago..
now i need the transaction hash oft that purchase as a proof for buying...
how to obtain that proof or TX hash? the exchange where i bought (p2pb2b) provides only date, amount, price in my trading history..

and ETH explorer etc. is not helping, don´t know how to find the old transaction (the buying) there...
tried the XDCE explorer as well but it seems to be impossible because i don´t have any search options for date..
with the deposit adress alone it´s not working.