cancellation of renewed contract

On 1st Oct 2017 i visited the Telkom in Woodlands to change my current data contract Home Office LTE 50 Gig @R1149/month to a R449.00 contract. The original 2year contract ended June 2017. The agent who helped me was Rhulane Nokeri. He requested that i put this in writing which I did. Nov 1st, i went back to the same branch to enquire about the new contract because the new contract was not active. Dudu Kabini told me that the contract of 20Gig day and 20 Gig Night (double) is active and will come into effect in Nov and is a month-to-month contract. Today I received the statement for the old contract of R1149.00 When i phoned in to complain about this, the agent told me that the new contract was cancelled. I am not happy with Telkom for the following reasons. 1) The account is not in arrears - never was as it is paid with a debit order 2) They told me that the contract is active while it was cancelled without notifying me 3) I am paying a higher fee as agreed upon which is *******.

I would like to have the statement to be credited for the difference between the two contracts