Pathetic Service from EMM - NO REFUND FROM 2020 after sale of property.

I sold my property & transfer was done in September 2020, I then went to the municipality for my refund of R5 061.30 to together with the supporting documents received from the attorney, filled all the necessary documents & submitted. I was told that the new owner must open his account in order for everything to be moved to him which he subsequently did. I then went back to the municipality to fill out the forms again but to date I still haven’t received my refund. I didn’t receive my refund from the municipality but instead was told that I now owe the municipality over R25,000 I do not know for what , when I queried how they issued the clearance certificate I couldn’t get an answer. The municipality does not want to pay me back my refund and the account for the house which I sold is still opened under my name and accumulating costs month on month. The new owner has his new account and everything is running smoothly from his side with no issues. How can the council come back after the matter is registered and request me to pay? Can I have this escalated to the necessary person and sorted out ASAP. I need the account to be closed and my refund please. I am really not happy with the service I'm receiving from the EMM.