Telkom mobile contract upgrade a **** or intentional contract tamperring.

I got a call from some ISP telemarketing company for telkom to upgrade my Flexon 2 to Flexon 4 for R50extra aper month ...as always the is recorded but I never agreed to cancel my device after I asked the sales person that I dont want any interruptions on my services. My services got cut off on all other lines but was later reconnected but with my new invoice there is a R4000 device obligation that I am requested to pay that was not mentioned or explained and I never agreed on for it. It is a never ending cycle to get to speak to a consultant at the Telkom customer service centre and you get transferred so many times to some one that just cant help you ...not fare at all that my 3 line gets disrupted because they sell you something half explained but you must pay for it. Dear Telkom for the past ten years I was a customer but I think its time to move on . I would really love to speak to someone in a position to understand and rectify the situation. I did not ask for an upgrade so from now on I dont care how good the deal is from any telemarkter. It will be no thank you and then your call has been disconnected from my side. On a call request telkom call you at an inconvenient time and wont return the call later or confirm a time because what is a R1376 monthly payment that they will loose if they are making billions a month.