Idiotic accounts department and unhelpfull staff

Apparently I owe you money? I have been listed on multiple credit bureau's because of this, I've requested statements and invoices multiple time and not received anything to date. I phones into your accounts department yesterday, was told I will receive it via email now and it was sent, this after I confirmed my email address . Your amounts make no sense as it's listed as R499 and when I phone in they say I owe R3000. what is the actual amount and for what. I have been on hold with the number for the accounts department again for 30mins now with no answer either. Get your things in order as it is now effecting me negatively for a service I have not been part of since beginning of 2019. I need this sorted out before COB today 31 July 2020