E-Tshwane Payment do not work.

Last month on the 16th of November 2020 I paid my municipal account via the E-Tshwane website. This was done on the day before my account had to be settled. A new account was issued two days later (18th of November 2020 and the E-Tshwane payment where the E-Tshwane payment was not reflecting. My bank statement confirms that E-Tshwane received my payment on the 16th! Now I get a warning to pay the outstanding amount AGAIN. I will also have to pay interest on a payment which I have already done, and what E-Tshwane already received.