MTN Call Centre Telly sales

A representative phoned me from MTN today to upgrade my packages and I said, no thank you, I am not ready to upgrade. He said the packages that I currently have aren't available and that I should upgrade or my numbers will be canceled. At no point did I give permission for anyone to cancel my contracts, then he said where will I get the money to pay for these contracts. When did it become MTN's business to check on my financial wellbeing and budget in order to PUSH an upgrade??? I just spoke to the rudest person from the MTN call centre! Rudest person EVER!