Appalling aftersales service

I upgraded on the 25th of April 2015 and received a brand new SamsungS5 from Vodashop in Tygervalley. The phone started rebooting itself from the moment it was switched on, and did this evry two to three hours, requiring me to type in the simcard pin etc.I took the phone back on the 27th, relying on the 7 day exchaqnge policy, but was immediatly greeted with a bad attitude, one of the shop managers going to the back and getting out the contract I signed, which apparently states that on return of a new phone, it must be handed in for their technicians to check, and that it will take 2 to 5 working days, public holidays excluded. This was not ever explained to me. The problem with the phone is easy to test, and will not take more than a couple of hrs. These people just dont care. I had to phone them today to find out if anything was done or any progress made, and nobody in the shop knew where my new phone was or what I was talking about. I advise all Vodacom clients, not to do any business with these people at their shop in Tygervalley and furthermore request that this issue be sorted out immediatly. They feel nothing for me as the client. The phone is brand new. I am disappointed.