Worst service ever experienced

5 months ago I was sent a message on WhatsApp regarding my account being overdue. They did not even have the professionalism to do this via email. I then sent 6 emails with my proof of payments and after the 6th email I was sent a corrected statement. I am now sitting with the same issue 5 months later claiming I have not paid and disconnected my service. I sent them my last 5 months proof of payments and no response. I tried calling and keep getting robot responses. No competent people in their account department I mean how difficult is it to simply allocate a payment when it's done. Very poor service and unsatisfied