horrific customer service

On Saturday the 16th December I walked into Forever New at Canal Walk looking for a gift for someone. I was not greeted upon arrival in store but that did not make me angry at all I just thought that whoever the shop assistants were they were probably busy. I made my way to the section where the bags/purses were situated and after looking for about 5 mins I looked around as nobody was at the counter to ring up my sale. I then saw someone at the fitting room who then greeted me, I told her I would like to pay she then sent a different girl to the till area. The girl that assisted me with my payment for one was very unfriendly. I then told her I wanted to pay with a voucher which I had got as a gift and I would pay the rest with my card. She then proceeded to check the amount on the voucher and told me that there was nothing on the voucher. She then called the girl who greeted me in the first place to ask her if she had checked this the correct way. The girl then helped her to check it again, at this point I had been standing in the store for about 10 minutes waiting and I didn't exactly have the luxury of time as I was on my lunch break but I was willing to wait. She then rang up the sale and just put the purse in a bag and not so much as a thank you or a bye. Not even a sorry for the long wait. I am very disgusted at this service as I have never experienced anything like this in my life. This is a high-end brand in my eyes and to treat customers like that is unacceptable.