Bad Service

I received Sales Call in April for an upgrade to a wireless 20GB+20GB for R99.00. I was advised that they have noticed that I'm on 10G+10G paying R99 and I won't have 2 pay anything extra since it will be the same value it will only increase the term. The agent advised that they will deliver a new Sim and my 1st debit will be end of May. I reconfirmed and told the sales agent that I don't really need more data I'm only taking it because it's the same amount. I asked the agent what happens now with the 10G Sim he said I can finish off the data and not use further. When I received the new Sim I did exactly that used the 20G threw away the old 10G sim. End of May I was billed for 10G and 20G to date. Im disgusted by the service I've been receiving ive been in contact with the contact centre from the 2June spoke 2 Sharon Thwala who I've been waiting 4 her Team Leader Tony Venter .I've been requesting for Quality Assurance team to listen to the call. Spoke to numerous agents who place me on hold for 30min and hang up i.eMartha,stella logged a call with no feedback Ref *** Bella the so called Team Leader as per our discussion end of Jun she said July billing will be less R198 if my claim is correct she will call me back to date no feedback. Zinhle and Tom Tom hanged up I on me today 4Jul after spending 30min with each of them. After I demanded to speak 2 the Ops Manager or Call Center Manager. This is why you will have high volume of calls because there is no 1st call resolution. Such employees who don't take customers seriously and not passionate about their jobs. I want my money back, I will not be paying for a simcard I'm not using.