Telkom ********ly charging customers penalty fees

I was sold the incorrect contract on 05/01/2016 @ R399pm and cancelled it and purchased the correct one on the 12/01/2016 @ R599pm WITHIN THE COOLING OFF PERIOD. I received confirmation from Telkom that there would be NO penalty fees. I spoke with Bongumusa Si***ane from Telkom, who advised me on the process and confirmed with me over the phone and via email that there would be no penalty fees. This morning I received an invoice from Telkom charging me R1025 for a termination penalty. This is in breach of our contract and contradicts everything that Telkom have discussed with me over the past few months, which I have records of. I previously had problems with Telkom debiting my bank account for the incorrect amounts and and putting me in such an unstable financial position, that I cannot honour all of my financial commitments over the last few months and it seems as if they only attend to your query after you report them. I also have an unresolved query with Telkom up until today, Telkom still have not explained to me, why they are charging me R607.50pm but my contract is R599pm.