OnAir TV misleading sales

Sales lady misled me, Ultra DSTV Explora - I told her that i have extra view and she said there will be no additional cost, and no installer needed. I was also driving when she contacted me after I told her I am driving she asked me or bank details and deduction dates - i had to remind her several times i am driving I just can stop - but she keeps going on just to make her sale. When Explora was delivered we connect it with main but extra view could not be connected unless i had to buy a splitter and get a technician out to do the wiring. I immediately contact them to cancel the contract and debit order - twice they say they have listened to conversation and sales lady informed me of all on which I disagree now 3 weeks later i have followed up every 3rd day just to get a reply that a consultant will phone me - nothing up till now - the 2nd premium is going to be deducted. They also deduct a onair plus service of R224 that i did not give my consent. When contacting onair plus the guy said you can cancel anytime. The bottom line is i don't want the contract due to incorrect info. When you phone in or via what sup it's a time-consuming process and the call centre agents are rude