waiting for a refund for the past 3 months

i write this complaint with utter disappointment i had over paid a bill in march and when i went in to a cellc store in mobeni durban a sales consultation gave me incorrect information that i had to pay R360 more which i did that same week i called cellcs customer care line to make sure everything was in order and the account was closed i was then told by shpiwe hadabe that i have a balance that was due to me which is R711 I have been trying from march to get my money back from cellc with no luck no 1 replies to emails when you phone the customer care lines its like talking to a brick wall they themselves dont know why the refund is taking so long everytime you call them they say within the next 7days the money will be refunded so basically thats how my 3months went i have lost count with how many times i called cellc to be honest..i have sent my proof of payments over 4 times and no1 replies after that i know its only R711 but at the end off the day its a customers money!!