Pathetic service - phone me immediately

I took out a 100GB LTE A wifi contract with Telkom beginning Feb 2018 - ********** 605. Everything went smoothly until I received a call a few weeks later from a lady advising she is phoning from Telkom - I later discovered that she called from Mobile Talk. She told me that I am due for an upgrade and can get my existing contract at a reduced rate monthly. I asked her numerous times if this was an additional contract which she denied. I could not believe that I am already due for an upgrade a few weeks after taking out the contract. A few days later the package was delivered - a LTE rooter and a new sim card with a different phone number - ********** 228. I saw on the invoice that this was for a 50GB contract. I immediately realised that I was sold another contract - the "upgraded contract" was a **** to get another "downgraded contract". This is against the Consumer Protection act. I started phoning various numbers and eventually spoke to a person who advised that the contract will be cancelled and that the package would be collected. The package was indeed collected a few days later and I thought the matter was closed - I unfortunately no longer have the details of everyone I spoke to as I still believed that Telkom can be trusted. This was until I received my Telkom invoice for the 31st March 2018. The additional contract was also listed and I was charged for both contracts. On 14 April 2018 around 12h00 I phoned 081 180 and spoke to Tstelo. I explained the situation to him and he referred the matter. He kept me on the line whilst trying to resolve the issue. When he eventually spoke to me again, he advised that it has been rectified and they I will only be debited with the one contract for R1 149 at the end of March 2018. I just checked my bank statement and Telkom has debited me with R1 306.84 on the 31st March 2018. I am charged for an additional contract which I cannot even use as the package was collected. I have been trying numerous times to get through to 081 180 but it looks like the number is no longer working. I want the matter resolved immediately! I also want a refund to my account for the incorrect amount charged! If I am not contacted by close of business today, I am returning the full amount.