Poor service

Despite all efforts edgars refuses to pass us a credit for the mobile cellphone content. W e have not received any airtime on the cell phone number given ********** . The thing is when i ask at the store what mobile cellphone content is they say they do not know. When i spoke to customer care and asked them what that is they say its advertising. This matter is now taking to long and edgars doesnt want to past the credit which is due to me of the amount of R550.00 and my account is now in areas and i am refusing to pay the account until my credit is being passed. I am now getting charged interest on my account and would like to know now who is responsible for the interest charges. We have been to the store many times in the past four months but nothing is being done. Please assist and intervene and help us retrieve what is due to us. We have supp**** edgars which all the relevant references given to us by the RMCS which they asked us to call to cancel. When we give this number to the stores and they phone the customer care to find out the reponse is that it takes 24 to 48 hours to be sorted. This is going on for the past months and nothing being done. I even phoned a lady at the response team and i tried to explain to her but she was rude and she cut my call. Please intervene and sort this matter out.