Pathetic customer customer support

I phoned the cell c customer contact Center when I was incorrectly debited a second month In a row. When I phoned them in June they advised me it was a “technical issue” now it’s July one month later and yet they’ve debited me on the incorrect date AGAIN !!!!!! When I initially took up this contract I signed it with the date to be debited on the first of every month however now Manqoba that I spoke to advised me that it is not possible to be debited on the first of the month that’s why my account was debited on the 17th. I find that highly unacceptable and unprofessional on cell c’s side as when I took out this contract the sales lady in the store did not advise me that it’s not possible to be debited on the first of every month. When I asked to speak to a supervisor or manager I was given the excuse “they are in a meeting” and I should call back later. REALLY???!! What kind of customer service is that?! Cell c has the worst customer service when it comes to their contracts!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!