Bad service / poor quality phone / NO CUSTOMER SERVICE

I took out a Cellphone contract in September 2016 for a Sony M3 or M4 Aqua at Vodacom Cape Gate, branch nearest to Checkers

My phone didn't want to charge anymore and my phone got very hot for no reason. I took it in almost a month ago, after 2 weeks I didn't have any reply from the store. I had to do a store visit, Vodacom asked me as the customer for a Job number can you believe it and one of the sales people said it is a problem phone, Why is a phone like that on the shelves of Vodacom1 week passed again, it's now almost a month and after I phoned now someone phoned me now only so my phone is repaired so let's hope it longs now otherwise I want a new phone, for it's still under the 02 years Warranty.