Credit due by Bitou Municipality

Hi, we owned a unit at Castleton 76A Plettenbergbay. The unit was sold and registered on the 15th December 2021. On the 15th December 2021 we received a account from Bitou with a credit amount of R2956.95. We then phone them just to find out that the finance people don' pick up their phones. After numerous calls i eventualy got through and was told that they do not work with the credits on accounts they are debtors and creditors only (incoming and outgoing) monies. I then phone the Mayors office and came through to his PA. She try to help me on 3 different occations, then she give me the head of accounts details. I phoned him and explain the situation to him. After that i send him an e-mail. I heard nothing from him. After a few mail communications he informed me that according to him it is a tax issue. I e-mail them and they come back to me and inform me that it is not a tax matter but finance. I again e-mail the finance depart with no rection back. In the meantime i received a invoice every month where they just keep on deducting the monthly amount of my credit amount. Up to now we got no co-operation from the Bitou Municipality to solve the problem and pay out initial credit as from 15th December 2021. Could you please assist to get this matter sorted out? Our account number is 16527087033