Unsatisfactory service

I bought a bed 26/03/2015 and it was delivered sometime in April. The people responsible for setting up the bed did it INCORRECTLY. At the time of assembly it didn't show any signs of incorrect fitment, but as time went on the effect of incorrect fitment started to show. The technician was called and he confirmed that something was incorrectly done at fitment hence the damage after a while.<br> As a customer I don't want the bed anymore as is it their fault its damaged. I don't want it repaired, I want a new bed or my money back in full as all this is their FAULT, NOT mine. I tried to talk to someone at Head Office and they refused. This is totally unacceptable. I paid a lot of money for that bed.