I filed and received a 2020 tax return and refund but there's no record on my account and my account says I did not file 2020 taxes

I filed and received a 2020 tax return and refund but there's no record on my account and my account says I did not file 2020 taxes. I need a copy of my tax return. I tried calling. I cannot get assistance from a human being. I spent 2 hours on this and am having an emotional breakdown because I need this for a home bank loan. I tried topics on this community. I tried the recovery link for my account. I tried everything!!! Maybe I'm not meant to get a home loan. I downloaded a transcript from IRS but the bank documentation portal won't accept it.