new contact cancellation

i received my new contract on the 25/02/2016 after i had to wait 2 weeks for delivery. then i find out that the contract is an open one (which i did not ask for ) 29/02/2016 i called them saying this is not what the sale person told me - they responded with 'they ll have to listen to the call' i must wait 48 hours. i waited 02/03/2016 i called again (ref***)yet again they told me again i must wait 48 hours. i told Angela no i want them to call me 10:00 she said she will escalate the matter - guess what? no one phoned me back 10:15 i called back again - i said they must cancel this contract today since no one will help me with this matter told them to come and pick up the phone (which was very fast RAM collected it the same day!!!!!) Sethaba (cellc) ref*** said that i must give them 3 days and follow up. i did that 15/03/2016 i called again ref *** saying again i must wait 42 hours. i phoned again on the 16/03/2016 spoke to llyvird he said that he will get back to me which he did 13:00 just to say he is still waiting for the response. now how long must i wait to get service?? - i am not going to pay for this!!