Mediocre, staff could be more welcoming

I go to silk a lot and usually enjoy my night, but recently I've noticed some of the staff can be arrogant. I got to the entrance with three other friends and we were on guest list. My friend who was first to go in said we were a party of 4 going named the guestlist, my first three friends went in then I paid a fiver and got stamped, but then all of a sudden she stopped me. The girl taking the money then demanded 7 pound and denied that I had given her a fiver before I got stamped. Almost like she had a memory of a gold fish or worse, dory from nemo! I then had to pay 7 pound, not only did I have to pay regular entrance when I was on guest list but had to pay and extra 7 pound on top of the first 5 pound I paid, 12 pound to get in!! Ridiculous, they should hire someone taking the money who can actually count or at least remember the money she's taking in! Anyway, apart from that I enjoy silk, dj is very good, it's popular, hard to get to the bar but that's like that everywhere! The bar staff themselves tend to be very good with dealing with all the people and taking money!