Promises they never intend to keep

Three months ago I noticed a sudden increase in my cell phone bill by over R800, when I phoned customer service to query the bill I was informed that it was due to add-on services. I have never ordered, requested, authorized or signed for any add-on services. I was informed that it was from a third party provider. I am to this day confused how a third party bill can be added to my cell phone bill without me authorizing it. A request was put through to cancel the 'service'. I was given a number to call as Vodacom said they could not do it on my behalf. I contacted WASPA and after a few days received an email from WASPA saying that the company in question, Opera Telecoms, had reversed the transaction and I would receive a full refund. I also received a SMS from Vodacom saying that I would receive a full refund. Don't believe them! The next month, there it was again another R800 plus and still no refund! Since then I have made numerous calls to Vodacom, numerous e-mails to WASPA, and received numerous sms's from Vodacom saying that a full refund had been authorized. Don't believe them! Now my cell service has been suspended, despite me paying my cell phone and data bill, but simply because I did not pay for an add-on service which I never requested or authorized which had been added to my bill. Very frustrating and infuriating