CTM Brakenfell management needs attention

I'm in utter shock with arrogance and poor customer service of Nigel(Brakenfell's manager) and his "assistant manager" I have bought over 10K in the last month on renovations with them and when applying the tiles with the crystals on that cost me 4K noticed a few missing crystals but had already bee app**** on the wall I has then taken photos and went down to the Brakenfell store and explained to the lady at the front counter which said she would talk to her manager and I then took a walk around the store to purchase other products and asked the lady to please find me on the floor with the resolution.20min passed so approached the lady again and she saw me coming then quickly spoke to her colleague which was busy on the computer explaining to her what what had happened.The lady in front of the computer didn't even have the decency to face me and talk to me but spoke with her back to me.She then proceeded onto tell the lady to take it up with the manager which was supposed to have been addressed 20min ago.I then proceeded to wait a further 10min for this unfriendly "assistant manager " whom I asked if he was explained the situation and he said no and told me to tell him again and I then showed him pictures of my wall with missing crystals he then proceeded on to tell me that I used a unqualified tiler which I disputed by showing him pics of the marble tiles I purchased from them 2 weeks ago that cost me over 6K.He then said he would go and speak to his manager and I waited a further 30min by this time I felt very disappointed that I was just being fobed off and the assistant manager didn't even have the decency to communicate with me as the manager walked passed me a couple of times without even greeting me and saying he will be with me shortly after almost an hour of waiting patiently.I then asked the ladies at the tills to please find out what was happening and they called the assistant manager again and I asked him what was the delay and his walked passed me into the back room mumbling something with his back towards me.After another 10min the manager Nigel decides to grace me with his presence and I asked him if I can show him pics of the tiles in question and he said not necessary as his assistant has looked at the pics.He then proceeds to tell me that they checked footage of the day that the goods were delivered which I find odd as how do they know date and time and when I went onto further question Nigel he said the tiles were checked which I also found strange as the boxes were sealed and there were a couple of sheets per box that had foam over each sheet.Nigel was not intrested in giving me a solution with a wall I was now sitting with a few crystals missing or giving suggestions of how having to resolve this amicably and now understand why some of the staff are not so friendly or make you feel like they are doing you a favour by talking to you and dont have the common sense that if it weren't for customers such as my self paying their salaries they wouldn't have jobs!!! I'm very disappointed in wasting over an hour of my life with CTM Brakenfell and will never support them again!