I paid my account but it is still suspended

I have had a bad service from Hypa I paid my account on the 27 of September but my account is still suspended I was told to send proof of payment and I did exactly that, I have been calling them ever since but they keep taking me from pillar to post telling me that they have escalated the matter. Today I requested to speak to the manager by the name of Tshepo he then said he would look into the matter, I told Tshepo that I will call back after 2 hours and he agreed upon calling back I was told that he was in a meeting of which he was clearly avoiding me. I am really disappointed by the service they are giving, I do not even want to mention their WhatsApp platform very very bad