Incorrect contract, No feedback and no assistance

I went to Telkom about 2 and a half to 3 weeks ago to take out a contract for Smartbroadband 10GB wireless for R 299 a month. Long story short i was approved and went to collect the item..When i received the product i did not sign any papers i was just given the item and told i will be emailed the proof of contract. When i logged on Telkom i saw they took out the Smartbroadband 20GB for R 399 on my name which is the wrong contract and more than i wanted. I then logged a query to sort this out just over 2 weeks ago and have not even been contacted to say its being attended to or anything..I want my contract to be amended and to receive my proof of contract