Telkom robs customers with they PRO -RATA scheme

Good day,i have upgraded my home line in December and all was good until we have received the statement on the 18 December which was R1696.50 I contacted telkom and she says it was pro rata and that il pay for 2 months but i wont pay for jan which i still do received that statement today 18 January 2018 which is R600.80.regardless of just the ridiculous amount in December they have incorrectly charged us for was for some devices which is supposed to be free but they try to fool you in your statement!i have filed a case report with telkom in December and has not been resolved.very unhappy with telkom and none of this would happen if the sales people @ telkom tell us all the costs that will occur then we wont bother taking it up whether we can afford it or not i wont take telkoms nonsense fix this and stop robbing customers!