FIX YOUR ACCOUNTS DEPARTMENT STAFF

I have paid my account with rain for a very long time since before this new rain one, now september i paid my account of R410 twice a total of R820 for the month of September and for the month of august i paid them around the 15 or 16 but was paid and was about R1050 now come month of Septemeber and now they charging me double when i request a reason they dont phone me they just leave me a message on the app kr website saying its payment for september and october which dont make sence because i already PAID SEPTEMBER . When i called and asked to speak with the accounts people they say no they cant transfer me to them because the only call the clients upon request but ive requested them to call me to explain whats is going on and still nothing. NOW THEY WILL CLOSE MY INTERNET ALL BECAUSE THEY *****ED UP MY PAYMENT AND MAKING IT MY PROBLEM INSTEAD OF TAKING RESPONSIBILITY AND APPOLOGISING TO ME AND FIXIN THEIR PROBLEM