Starsat poor customer service

I joined Starsat a couple of years, upgraded in the meantime. My salary is paid on the 15th of each month of which they are well aware. They demand payment on the 15th, fully aware it takes 2 days to clear both my bank and theirs. Paid my monthly subscription the 14 Dec 2018 at 19h38. They suspended my subscription 18 th Dec 2018 because they have not received my payment. By their on admittance they are aware that we have just had long week-end and payment could be delayed. Usually due to Standard Banks unreliable system payments made or received are always delayed. Starsat at 20h00 just suspended my service despite my payment, my account is not in arrears, the supervisor undertook to call me back and after 55 mins still no feedback or re-connection.