they have never attended my quiery

I have asked intec to cancel the course that I registered with them and still my query has not reached the person responsible for the cancellation. I have sent the request on the 25/08/2015. today (26/10/2015) when I called and ask about this issue Horied said they are still going to debit my account for 90days after receiving the cancellation. I think they are delaying this process to make money. I am very angry and I want them to stop debiting my account. I have already paid a lot of money that is deposit R2400 and they have debited my account 10 times.