Poor service.

I have been calling many times, i even lost the count , I have requested for refund since April and to date they haven't given me a feedback. every time i call they tell me that they will push the query but still no communication . They have logged a call tree times and after few week it get closed without any communication. Vodacom please send my money because i have been told to wait for 21 days and its been more that 6 weeks now. What should a person do to get her money back . I have been with Vodacom the whole of my life but i am starting to doubt their ability because they are failing to do just one simple thing. Communications is very poor . If I would rate it at this point I will even give then a negative number, I am not happy at all. I want my money back . All i need is just a respond regarding my query. They have failed to assist me in those many days . Agent would call but nothing seem to happened. Its forever escalated but no results.