Pricing issue

Vodacom charged me 12 months for a handset I never had, I have logged a complaint (ref: 1/ ********** ********** ). A week ago I received a sms confirming that my complaint has been resolved with no further feedback. Couple of days later I received an invoice from Vodacom stating that I now own them R3551. I had to be credited for paying a handset for 12months, instead Vodacom went and did very funny stuff. I have contacted the call center and as expected they just referred me to the complaints department! It makes no sens, Vodacom charges for an extra phone that I never received and then the go on and instead of crediting me they go and demand R3551!!!!! Please Vodacom get your act together, reconcile, credit my account with the money you took from me and get someone to phone me with feedback! Do not run around and send messages (Resolved!!) just to find out that case closed......pay us!