Vodacom Fibre

We recently took out Fibre with vodacom, We were dealing with a sales lady by the name of Lungile. She was very quick to take our business but the after sales service is disgusting, We were told we could activate the fibre line once our telkom had been switched off they came to install everything and made the fibre line active immediately, we contacted Lungile as we didnt wanted to be billed twice from Telkom and Vodacom, after days of trying to get hold of her she eventually **** to us and said she had confirmed with the accounts department that we would not be billed for September as it was there mistake. We received the October statement and there is an invoice for R1188 for Fibre. we were charged for Sept and October. We then contacted Lungile again to ask why were billed. she said she would find out for us. she is now ignoring all of our calls and messages. We have all the evidence of our conversations with her regarding the mess up. Vodacom please can we get assistance with it or action be taken against your employee