Lidl complaint: Rude unhelpful lazy and ignorant staff

I am a,regular customer at your west bromwich branch and I am sick to death of not being able to use the TILL facilities. Time and time again your staff close down the only TILL available and telling me to use self-service. When spending money in the store why should I not be entitled to use a staffed till rather than self service? This Saturday I attended this store at approx 6pm following a long day at work. There were no trolleys to be had so I was forced to use a basket. This just about contained my shopping. I approached the TILL to be told rather Rudely that it was now closed and that I had to use the self service till. I was not happy about this as I am not a fan of computerized shopping preferring the old fashioned shopping experience. I asked why I could not be served by her and she said she wasn’t prepared to serve me as there were seven self service tills for me to use. She point blank refused to serve me so I had no option than to use self service. As I was leaving the shop I noticed that the TILL was now open again being maned by the same staff member. I approached her and asked why she was now open again and had refused to serve me ? She rudely replied that I did not have a trolley so she wasn’t obliged to serve me. I was not happy about this and told her I would have had a trolley had there been one available. At no point did she apologise. I asked for her name which she told me she did not have to do and to ask one if the other staff for their name. So I asked the other staff member what the girl on the till was called to which she replied Lauren. Well Lauren is a very rude ,lazy and unhelpful member of your team. I’m sure if I had acted like this in my line of work as a staff nurse or one of my staff had acted in this way I would be ashamed and expect to be complained about. It would not have hurt her to have simple served me.