Blackberry

Bought a Blackberry from FNB online store. Device arrived and everything was working nicely, about a month in the blackberry stopped working, didn't want to switch on or charged itself.. No psychical damage, nothing. Phoned them and they picked it up to send it to the repair center. <br> <br> They phoned me to tell me they cant repair the device and will have to give me a refurbished device instead. I told them that is fine, as long as I get a phone that works. The device arrives and guess what, its not working. <br> <br> The device switches on and after 5mins switches itself off again. Now comes the complaint, I've been struggling for over 3 weeks now to get them to collect the phone. And almost a month and a half that I don't have a working device. What am I paying for? a broken device that they refuse to come pick up to send to the repair center? I've tried sending an email to FNB itself but they don't respond either so this is my last stop.