Your BIlling Department giving me wrong info

On 2 June 2015, I moved my line from Richards Bay to Durban. I normally paid my account at the telkom store, but because I moved to Durban and store i was near didnt accept payments, I called Billing to find out the Easypay number so i can pay. I called on 25th June, and spoke to Sithokozisile Nyathi who confirmed that before my line was moved, I made 2 payments in the month of May, that I am now in credit of R18 on the account, After much confirmations, and checking if i dont need to pay, I ended the call knowing that I dont need to pay for June 2015. On 6 July, i received my statement, only to see that you are now asking me to pay a Double Premium. I then called the billing team, who confirmed that they will escalate. after no answer, i called on 17 July and spoke to Vanessa Sauti, who confirmed that she will escalate again, and that I just need to pay the normal R569 premium. I did so on 25 July. Now 6 August, i received my next bill, only to see that youll still want me to pay for June. I called back now, only to be told by another consultant that I just have to pay it, because youll made a billing error. I will not pay that amount, as your team advised that I was in credit.