Unsatisfied with my service

I app**** for Adt in December 2014 as a new home owner with an owned system. Sales rep Ian De Vos was appointed to me. He came to my work that same afternoon Sanlam head office to sign the documents thats what he said on the call. At arrival he asked me a billing date my bank details etc. a d/o date of 28th was agreed i get billed the 1st or the 2nd. I was never told anything about a 24 month contract which i am legally agreeing to. He asked me to sign here an there and spent 3-5min explaining what he could all the benefits and he going to organise 1 month off and so on. No legalaties were discussed he just said paperwork now will come to my place later to setup and explain more. I asked him if im not happy can i cancel this service? he responds yes we deactivate it if you not happy. I would now like to cancel because of lack of communication bad service and worst of them all TCF. I refuse to pay any further installment or pay any termination fee for a service i was manipulated into buying. I have contact numbers of Stuart Clarkson and the new Md Adrian Good which i will use if not dealt with. They dont always call, Fri on call the guy was speaking to his colleague instead of me.