Over billed on my account and services not cancelled

On 6 October 2017 I submitted a cancellation form for the TIN (data) ONLY to be cancelled. My full services were cancelled and we were without Wi-Fi at home until Telkom reconnected us. I specified that I do not want the data from Telkom. My billing is R619 a month but I was debited R704.71 for 1 Dec 2017. I then stopped the debit order as I was overcharged and the consultant at the Greenacres branch was unable to assist in this regard and said I need to contact the call centre. When calling the call centre it takes very very long and the hold is very very long. I contacted another service provider but now I am struggling to get the ADSL line stopped at Telkom as I want to migrate the ADSL line to Mweb and use uncapped data from Mweb. I paid R199 end of Dec 2017 for the Telkom voice line which is needed for this service. Telkom has since a message to say that they will terminate my services due to non payment but the voice was paid and in Nov I was over billed as they have reconnected incorrectly.