Incompetence in the extreme!

I am the registered owner of a property in Fishoek, but I live overseas. There is a tenant on the property, and I pay the rates. For the past 8 years I have paid my rates account with my overseas visa card via paycity.co.za. For unknown reasons, PayCity no longer accept payments on behalf of the Capetown City Council. I emailed the council on the 27th of December and as seems to be the norm had an automated response to the effect that they would get back to me in 7 days. I then decided to call the council on the number listed on their website, and I got an email back from them with their bank account details. Payment in the amount of R2800 was made to them by international bank transfer on the 30th of December 2020, and I received a proof of payment by my forex service provider on the 31st December. Proof of payment was sent by email to the council. I checked my account a week later and noticed that the R2800 that I paid had not been credited to my account. I emailed again, and still got the usual automated response and nothing else. In addition to emails. I have made at-least 5 phone calls and all I get is an undertaking that the query has been referred to the department concerned and I will hear back form them shortly, which of course I never do. In the mean time, my tenant is having part of her electricity payments deducted to pay of this alleged outstanding amount. She is a person of limited means, and she pays me a nominal rental. The downright incompetence of this institution is mind boggling. They neither act on queries nor do they reply to emails. In the meantime they have now charged me another month's rates and are threatening legal action for recovery of so called overdue amounts. I do not wish to pay them for this month as I am sure they will miss allocate my payment again. Yet they do nothing!. What am I supposed to do? Is there any person or institution that can take this up on my behalf? If I could get on a plane and visit them personally I would do so but due to covid this is impossible