Call centre agent

A lady from Telkom mobile called me from Durban about a month ago about a special deal. I agreed to take the contract but I informed her that I could not wait as I was I a hurry to get a new contract. She then told me that it should be delivered within the next week or so. About 3 weeks later she phoned me again after which I asked her to cancel the contract I told her I was in a hurry and I had to get another contract in the meantime. She then told me that she couldn't cancel it because it is processed and that it could still be delivered that day. It has now been more than a month from the original and still nothing. I need this contract to be cancelled asap as I had to take out another contract. Obviously this call centre agent just does not want to lose her commission and that is why she wouldn't cancel it because no delivery in sight. Cancel it ASAP!!!!!