Poor client service

I took out a cellphone contract with Telkom in March. A few days later I then requested a call back for an insurance quote with them. The first call I received was that my device will be insured for an amount of R120p/m in which agreed. The lady then advised that she will send an sms and email with the policy information. To my surprise, a few days later I received another call and I was quoted R80 for my insurance which I gladly accepted and just like the previous consultant, this was too said I will get a text and policy information. My instalment debited in April and I was shocked to see that I was charged the first amount instead of the second. I have been calling the customer care line and all these consultants just beat about the bush and take me from pillar to post and no one seems to have an answer for me. I simply requested to be sent prove to why the second telephone agreement was not honored. The level of service is really pathetic and no one wants to take accountability and provide me with proper feedback. I constantly have to call to follow and no one seems bothered to give me an answer.