Cell Phone not working correctly

In February 2015 I was due for an upgrade on my Vodacom cell phone contract. I went to the Vodacom shop in the Highfeld Mall in Witbank. I told them that I am interested in a new Blackberry since my previous phone was also a Blackberry and I was very happy with it. On my previous Blackberry phone I had free BIS. On my old Blackberry smartphone I could surf the internet for free and uncapped on the device itself. Also I could send free BBM messages. My Watsapp was working 100 % correctly. Also I could use my old Blackberry as a modem, connecting it to my computer and surf the Internet. Now with my new Blackberry I can't do none of these: My BIS is not working, I can't surf the internet for free on the device anymore, my BBM messages are not working, I can't use Watsapp, I can't use my Blackberry Smartphone as a modem anymore. I went back to the Vodacom shop and they could not fix it. They then referred me to another Vodacom shop in Saveways Witbank. They also could not fix it and they send it several times to Johannesburg to fix. Every time I have to wait 2 weeks for repairs. Every time they gave me a new Blackberry, each having the same problem. I feel that it is very bad service!<br>