Refund due from Vodacom

So my contract /device was upgraded in December 2014 from a blackberry to a Samsung. 2 months after the upgrade I discovered that I was charged R 59 for BIS and do not use that service. I then queried this with the customer care and upgrades dept where the BIS service was then cancelled. The R 59x2 however needs to be refunded to me as I have not used this service and have been charged for it. I logged a call ref:S3-8XV3P-P0OEV and received a message from a Natalie O'Reilly confirming that the refund has been sent for approval.3 months down the line I noticed my account had not been credit and short paid Vodacom R 120 as a refund had been due to me. I phoned the customer care again Ref 375 751 800 and still no response after talking to a Kelly,Sibu, Reece ( a supposedly teamleader),Nompucuko and a Luubabalo. Today 2015.04.20 my phone get suspended because of a R120 refund that im waiting for Vodacom to refund me??? *** is wrong with these people???I've has this contract for over 10 years and this is the best yet.Can someone please contact me so I can terminate this contract I've had enough.