OnAir ****med me

I was called by an onair tv sales person telling me they are offering me an upgrade from my DStv access to DStv explora, and I’m going to pay R199 a month including the DStv channels but that was not the case they debited R179 and R139 amounting to R310 of which I didn’t agree on. Today I’m calling they taking me from pillar to post playing saying I have to pay R4800 if I want to cauncel my subscription. The decorder it self is been blocked even after they debuted that amount we did agree on.