Bad Bad service and taking my money

I got a new Samsung Galaxy S6,on a contract with Vodacom. I had the Phone for 2 weeks and it started giving problems, I took it to the Vodacom shop in Robertson. They send it in for repairs - got the phone back after 2 weeks, I then just had it for 2 days, and the phone gave the same problems as before. (Switched on and off the whole time) Took it back to Vodacom, and they send it away for repairs again. It's now 2 weeks and no phone. ONE MONTH IN TOTAL WITHOUT A PHONE AND I MUST PAY MY CONTRACT FOR THE MONTH. When I ask the manager of the Vodacom shop, why should I pay my monthly fee without a phone. SHE REP****: SIR DON'T YOU HAVE AN OLD PHONE TO USE? I am paying for a new phone but have to use my old phone???? Vodacom you are up to ****. REALLY!!! The biggest cell phone company ripping me off!!! Taking my money.