Pathetic Serrvice from 8TA - Ongoing query 2months

I requested 2 months ago to renew/upgrade my contract as it is now 2years old. My no. was changed by Benedict who assured me here would be no problems & my existing contract will continue as normal. Since beginning July numerous cases have been logged by Telkom store in Gateway & via the call centre but still no resolution/FEEDBACK/COURTESY CALL not even from the many so-called MANAGERS. I spoke to Thumelo on 01/08/2015 @19h40 & got case no. ***8 with assurance I will b contacted in 72 working hrs, but NO-ONE called &case was closed. I called again on 05/08/2015 @ 20h00,spoke to Melissa who assured me she was referring to the manager 2 call me, called again 7/08/15 @ 13h50 n spoke 2 Menzi who said Manager will call me Tuesday, called again 11/08/15 @ 16h30 n Risham/rishen Naidoo said Sarah from credit dept will call me next day @11am, no call so i called today @ 16h35 asked for Rishen and held on for 15min, agent Khothotso said he refused 2 take my call, i refused & asked to speak to him and wait 4 22min b4 he came on line. His attitude is pathetic, gave me excuses of how he starts work @ 16h30 but by 16H57 he was still not logged on his pc to check my case! Was very unhelpful