SARS UNKNOWN DEBT

I have had a bad experience with Sars. The SARS mobi app it's saying I'm owing SARS Ten Thousand and something which is interest bearing and SARS consultants and their Head Office cannot explain how I owe them. They all passing the buck. I've visited the Rissik in 2020 to do my returns.I was told to pay a Thousand and off rand which I did and 4 month down the line.I receive and sms that SARS done my returns. When I log into the app to my surprise I was owing Eight Thousand and odd rands. I feel I'm being targeted by SARS. A person doing customer service cannot owe SARS that much even my tax bracket doesn't match that. I need SARS to get back to me and stop the interest bearing debt which I know nothing of.