Customer service sucks at game kenilworth centre

I bought a Acer laptop at game canal walk on the 14th august,the saterday night I charge the laptop overnight the Sunday morning the battery was still flat I thought to myself I probably didn't plug in the charger properly I then charge it again the Sunday and only used it for about 30 minutes and switched it off again. The Monday morning when I switched it on it showed battery critical.i then took the laptop to Game Kenilworth centre for them to have a look at it or swop it out the guy in the laptop department was so unprofessional he told me they don't have stock and I must go back to the branch where I bought it as it was not there problem I then ask him if they can't send it to Kenilworth game then I can collect it when it arrived,I told him to have a look on the system to see if they had any stock in canal walk as I didn't want to drive there in the rain and they mite not have he checked for me and told me they have 24 in stock and have to swop it out for me as it's not yet 7 days old. I then took a drive to canal walk they sales person in the laptop department had a look at it and was very professional at what he was doing and then told me he can't see any fault but will swop it out for me,I spoke to the manager In charge at canal walk by the name of shahied Isaacs and he was very helpful in assisting me with authorising the swop out