No/Bad service

I upgraded in July 2015. I was assured that the MS phone 640XL is the best for my business needs as I own a guesthouse and all my business is done via the phone.<br> <br> A month after I received it, it started shutting down by itself if you put it down or when it came into contact with my ear ring.<br> This is a BIG concern as I lose the calls and that means lost bookings for the Guesthouse as it looks really unprofessional.<br> <br> I have practically gone back to the Cell C shop every week with this phone since then.<br> <br> I have been told countless times to reboot/reprogram the phone. Once I was told to bring in my laptop. I went home got my laptop, went back to the shop and they couldn't even help me do that as their system was off. Then the next day, I went back again only this time to be told that it's not necessary to bring your laptop.<br> <br> I am absolutely sick and tired of travelling back and forward to your store. Your personnel have no regard to the fact that I have a business to run. This story went on for month. 3 x it was send in to be fixed with NO results. I purchased the phone for a spec reason, but the phone does not do that. I'm cant pay it as its not working. I NEED A WORKING PHONE!!!