CELLPHONE CONTRACT

I renewed my cellphone contract with Telkom via sell direct in September last year with the promise that I would get a HUAWEI handset that will come with 500mb data and 50 talk-minutes every month for 24 months for R99-00. I have been receiving all of the above from September 2016 up until March/April of which it stopped and when I raised a query the outcome was that I was on a different contract which gives me 75mb + 50 talk minutes. I then raised the query again of which this time around I was told I don't have a contract with Telkom and that I should send a cancellation form. I have the recording that proves that I was promised the 500mb & 50 talk minutes. I then decided to cut ties with them by sending the cancellation form of which today on 25/10/2017 I got a call from one of their consultants asking me why am I cancelling whilst I still have 12 months in the contract which just got me livid. Can you please help.