Game un-co-operative staff

I purchased a keyboard / mouse combo, it lasted a few months, when I returned it, the assistant told me that it must be a once off, and replaced it. when we unwrapped the new one the mouse ran around on the screen - completely on its own. So back to Game again, I requested assistance from the staff in that department - no one available, at 11h50, so they sent me a cellphone guy who knew nothing about keyboards etc. At least he tried to help me, I was advised that there is no way of testing the item before leaving the store, which meant if there was something wrong I would have to go all the way back again. In the end I just took another brand and it seems to fine now. My biggest issue with Game is you can never get hold of them on the phone (I have proof of this in an email) and there is no one in the department when you do pop into the store. AND when you do find them, you have to wait for them to get off their cellphones first. The staff acts like they are doing you a favour. Unco-operative!! Floor staff should not be allowed to be on their cellphones whilst on duty.