Confused departments

i have been batteling to get my credit refunded since 24.05.2015. on monday i decided to contact the accounts dept. to find out why the refund is taking so long. i tried about 7 times to get through and after the 3rd time the system asked that i leave a number in order to be contacted, im still waiting. on wednesday i finally got hold of acc dept and i was told that i need to speak to the CANCELLATION dept to get my refund, they very nicely transferred me and then i was told that i need to speak to the ACCOUNTS dept. this morning i contact the ACCOUNTS again and i was tolt that i need to speak to the Retentions depart to get my refund and that i need to gve them a 3 months bank statement that will cost me R50 in order to confirm that its my account and they will not refund me for the cost of the statement. the lady advised that she will be transferring me to retention and their number is ***, the next moment im@ Vodacom insurance department. to me it seems as vodacom does not want to give my money to and that no one knows waht they doing in vodacom as everybody is transferring me left and right to departments and still i have not been refunded almost after a month. please help