Rude call centre agents

I went into MTN in the Newtown Junction Mall where I was left standing and the consultant didn't even bother to greet. I left the store with no help and wanted to know if I could purchase a handset for my helper. I came back to the office to cancel a debit that I know is going off my account and I have done no upgrades from the very first time I opened the contract with MTN. The call centre agent Phumzile (ref number ********** 27) took my details confirmed my information and did the checks with me and then transferred me to Tebogo in cancellations (ref ********** 41) without giving him any details. He then does another verification of my information which is very irritating. I then have to explain the story to him again and by now I am getting annoyed with MTN. He then puts my on hold for what I feel was a rather long time and comes back saying the contract has been cancelled also not listening to the fact that I asked him why I was placed on hold. I ask the question again and he rudely explains to cancel the contract. When I asked for the ref number he then places me on hold again. Of which Phumzile didn't have to. I received the ref number rather quickly with her. I know how call agents operate in a call centre and I know the agents think its rather clever to place the clients on hold when they feel like they don't want to deal with them. I don't not appreciate the lack of interest such a BIG corporate has in their clients. I took the contract out when I first started working and it expired at least 10 years ago however the debit order had still been running. I was hoping to get my helper a new phone on that contract but no interest in me I have no interest in you. Please confirm that the "contract" has been cancelled. I do not want to spend my money at MTN any longer.