Billing and Terrible attitude By Cst Service Rep

I am a new client in AIG and just cancelled my insurance with my old service provider. I was advised by a sales consultant that the first debit order will go through on the 20th of Apr but they debited me on the 16th instead. As a result the debit was unsuccessful as there was no funds, I did not call to claim the charges. Today its the 28th and there has not been any debits of my premium, so I called in to find out what is happening and if my insurance is still active. I got put through to CSR by the name PULENYANA TAU, who introduced himself and I asked to please refer to him as Pule as his name is too long but he refused (with attitude). I then asked to be put through to his manager (Cecelia he said her name is) but the phone went straight to voicemail, I then called again and asked to be put through to the manager and he still refused and said she will not take my call on his desk either as she always refuses to take escalations (which makes me wonder why is she a manager and who is she managing). Pulenaya's attitude was terrible and has no willingness whatsoever to help clients. He was back chatting me and shouting and interupting me as I was speaking UNBELIVABLE. Pls help!