ridiculously poor service

Account was locked due to arrears 2 weeks ago, which was not correct. I contacted dstv call centre explained that my account was upto date. They viewed my calls and concluded that the amount will be reversed and the manager will contact me. My account was unlocked. I phoned today to upgrade my package and I was told my account is an arrears. I spoke to 3 agents, who promised to get their manager to contact me. Nobody has contacted me. This is ridiculous poor service. U want to invest in systems upgrade but clearly the human resource needs to be up skilled. So now I remain without the package I want and with an account in arrears. Somebody assist