Incorrect Billing. No response by ***** Departmen

I opened a data contract with Altech AutoPage Menlyn Pretoria in 2013, since the inception of the contract the account never exceeded R327.50 pm. In October 2014 I received a bill of R1187.42 and R973.49 in November 2014. I then realized that there was a new voice line number that was added to the contract without my permission. I called the Menlyn branch on the 17/12/ 2014. I was informed that I must call Cresta branch as the new line was opened at Cresta branch. I immediately contacted the customer centre on the 17 /12/ 2014, their line were busy (I kept holding for about 26 minutes per call) the whole day and were not answering my call. I then sent an email the same day to [Email Removed] .On the 18/12/ 2014 @10:23, I called Cresta branch and spoke to Tumelo who advised me to obtain affidavit from SAPS. She said that from branch there was nothing they can do, I should rather go directly to Head Office Midrand or send affidavit and copy of ID to request for ***** investigation. I then sent the email on the 18/12/ 2014 and received a response on the 23/12/ 2014 with reference number 542072.On the 06/12/ 2015 I made a follow up and I was told there was no feedback