Pathetic Customer Service!!

I bought a Lumia 830 2 weeks ago, within the first 3 days of purchase the charger wouldn't charge. So I went to Vodacom in Tokai with my phone. I was told that the phone would have to be booked in, but that I wouldn't be charged for repairs because I had the phone for less than 7 days. I handed over my brand new Lumia, along with its' accessories, and I was told that it would be exchanged for a new Lumia 830. I was told that the assessment process could take up to 5 days. 5 business days later I contacted Vodacom and found out that my new phone had been approved, and that they weren't able to contact me because my contact number wasn't on the system (all this while I'm holding a copy of the doc I initially submitted with my contact number on it). They told me they didn't have the phone in stock, but that they would contact their other branches to find out whether they had any. They promised to contact me (which they didn't). Today I called them for over an hour, and eventually decided to visit the store. All I was told was that they didn't have stock, and that they would contact me when stock arrived. This is my first contract with Vodacom and I have to put up with ****py service!!