After you file

I mailed 2018 taxes and my tax transcript and record still say it has not been processed. I mailed them in June 2020, yes in the height of the pandemic. No IRS representative can tell me what happened to them, although I do have a delivery receipt. The site advises not to resend - however at this point I'd like to still resend because I need them processed. I have a refund sitting out there that is well overdue. Any suggestions? 

 

The turbo tax software previously would not allow me to e-file, that is the ONLY reason why I mailed them in.