Cancellation fee too high and service provided questionable

I advised this company that i wish to cancel a product that I have only used for 7 days, upon requesting the cancellation I was advised by their agent that I have to pay an amount of R1600 to cancel the subscription I understand that a cancellation fee must be charged but why is it so high (in these times we have to turn over every penny) The facts are: I have been an unhappy customer with this company for very long because on numerous occasions i requested for my debit order date to be moved and they could not accomodate this The service over the years has been questionable and now that I wish to leave they still also let me know that this company does not care about their clients. I am most perturbed about the fact that even at the end of our client relationship they still do not care, and still provide the worst service with no understanding towards the needs of the client Very, very, disappointed and quite frankly disgusted