Billed for Dstv Explora I do not have

I am disgusted with the service I receive from Multichoice..For years I have been having a premium contract with Multichoice and on 1 Dec an agent offered me an Explora contract which I initially agreed on but realized later that day that it's actually a service I do not need. The following day which was the 2nd Dec I contacted Multichoice to cancel the contract which they claimed to would have done. To my surprise on the 4 Multichoice technician came to my premises to install an Explora that was supposed to be cancelled & we rejected it & told him that this order has been cancelled.. A Day later a courier services came to deliver the same Explora and we refused to sign it... I then contacted Multichoice and all the agents assisted me confirmed that this service has been cancelled., ideas then surprised on the 15Dec when my account was debited R2,100 by Multichoice & then contacted to query this & reverse the money & an agent dat was assisting me requested that I do it with my bank which I did...on the 1Jan 2016 I contacted Multichoice to my surprise I was told that I hav two decoders active. I need this to sorted out asap..,,