Which exchange have you used to send this tx? As far as I know, addresses not matching the prefix would recognised as wrong address type and you wouldn’t be able to send a transaction.
However, have you got any response? To get faster answer, check out if they have any telegram group. Make sure you are not sharing any credential info as telegram id full of scammer.
If the transaction hasn't been sent out, yet then customer support can help you cancel the transaction and refund your account.
Can a tx be released to a wrong address type? Which client allow that?