Incorrect billing

I have complained on this platform on the 25/05/2015, received one phone call a few days later and nothing since then. today I call thru and I am told that the deal I was supposed to be on - the smarthome essential for R429 does not exist & that Telkom ads excl VAT so I am being correctly billed.Since when do ads excl VAT. This time I spoke to Nontemengo who was extremely unhelpful.No one wants to help or even follow up.It is simple billing query.I was billed incorrectly,I need it corrected & to be credited.i was told to go to the store again.This is a deal that is still showing as a summer special when I Google it and we received all the extras - router, modem, 2 x sims but we are still not charged for the correct deal. It is unfair to continue to charge us R529 when we signed on at R429. Will this ever be resolved? Also we were told not to pay R29 as our debit order is a max of R500 for the account. Will this be another problem for us due to Telkom's incompetence? Don't promise that I'll be credited in a week and then don't even bother to call back. Also what is the point of a call centre when each person gives you a different explanation