Being billed for an acount i dont have

In March 2015 i called telkom to enquire about how it works and what the costs are to get ADSL from telkom. The call centre person asked my ID and adress to confirm if ADSL is available in my area. After receiving all the info and prices i enquired about ADSL, i thanked the gentleman for the information given and informed him that i'm not intending to get ADSL yet and just wanted to know what the prices are. To my surprise i received a bill in the post from telkom the following month. After receiving the bill i went to telkom direct in woodlands numerous times to get this bill cancelled . This is effecting my credit record tremendously and Telkom has done ABSOLUTLY NOTHING to fix this problem for 6 MONTHS NOW???? If this goes on for much longer i will be forced to take legal actions.