Vodacom Overcharge and NO FEEDBACK

I logged a call with Vodacom customer care twice now - once on the 20th (Service Request Ref: S3-GKS1E-ESIW5) received an SMS stating I'd receive feedback within 2 working days, I phoned again on the 22nd, they responded with they will log a new service request. On the 27th I received another SMS (Service Request Ref: A2-1IK0-U32UE), still no feedback. I now phoned again, they know nothing.<br> <br> Since May 2014 I've been charged 2 handset fees: One for Samsung phone (R250) that I sent back within 7 days and the other for the iPhone (R400) I replaced it with. Thus Vodacom has been charging me an extra R250 pm for the last 20 months and they will charge me extra again at the end of Jan 2016.<br> <br>