Incorrectly Billed for NON-ACTIVATED Service

I am getting billed for a Fibre service NOT even installed yet. The sales person who signed me up was Mthokozisi Derrick Hadebe (M). One line was converted to fiber ********** 234 but the other line has been due for almost 2 months and Telkom currently billing for it. I get no response from the sales person or any progress on when fiber will happen for other line billed incorrectly ********** . Call centre does not help, Telkom shop does not know and the sales person never replies to his emails.