Vodacom service is disgusting

People, Vodacom's service is absolutely terrible!!! I got my new contract and Samsung S4 Mini from Vodacom at the Lochlogan Waterfront in Bloemfontein on 24 October last year. It took them 8 (that's right EIGHT) days to activate the number. I took it into to get repaired on 27 February because the battery was overheating and the phone was switching itself off. I eventually collected the phone yesterday, and guess what? Within an hour the phone was overheating and switching itself off. This is a BUSINESS PHONE, I do all my communications including calls, emails and banking on this phone ..... And what am I told? \We'll send it back and escalate the problem to head office". Why is my \""new\"" phone not being replaced? Why is MY business compromised by Vodacom's continued inefficiency? If I need a new sim card ... I have to pay for it! Why does Vodacom not accept responsibility and carry all the costs pertaining to my \""new\"" phone and / or lack thereof over the past month?"""