Credit Bureau status

I had an account with fin choice loan past year I had defaulted my account and it was handed over to some debt collectors i paid it all and December 2020 and i got paid up and it was send to Finchoice (which they confirmed the account was paid and i it will take roughly 20 days to update my status on credit beareu ) till today my status is still showing that I've got arrears with Finchoice on Experian. To make matters worse Finchoice gave lawyers the wrong account number, my Original account was *** and now is *** which I don’t know where it come from, apparently my account was changed to revolving hence the account number changed. Been trying to call them they don’t answer their call, I email and I got Auto reply every day that says “ Credit status will be updated in 20 days, since December 2020”. The wrong account number on my paid up letter is giving nightmare cause all the financial institutions says that paid up letter does not represent the same loan account they seeing on the Credit Bureau, Bad service, I'm really angry as we speak because now I can’t apply for credit anywhere because Finchoice is a stumbling block in my life