ASK ME WHY I HAVE TO BLOCK CARTRACKS NUMBER ??????

Let me tell you the answer ... You would think that if a company is providing you a protection service as CarTrack does, I would answer every call ??? I do but it is either a marketing call to sell me something or its the admin department to see if my details have changed (which they have not) . they call me almost every day and I have asked on numerous occasions to stop calling me for marketing. I NOW HAVE BEEN BLOCKING ALL THE CARTRACK NUMBERS ON MY PHONE .... I asked to Cancel my contract and CARTRACK want to charge me R 13 000 so they can stop harassing me.... surely there is some decency and respect a company affords it customers ???? clearly not at CARTRACK