Pretty Nails NW2 Limited review: Pricing and discounts

I went in to the nw2 salon and asked for a manicure which was 10pounds and also the customer card which means I get 5 treatments then I get 1 for free and as I am a man I can only get manicure and pedicure which was priced at 35 so I asked if they'd do the 1st for 30 even though I didn't want to take my shoes and socks off but I just wanted to get the customer card. After the treatment when I asked for the card but they refused to stamp it as I already had a discount... So if I would have got the stamp and plus come back for 4 more treatments I would have paid 170pounds in total although they were arguing with me for 5 pounds which even if they id given them 35 for all 5 treatments then the 6th free one would mean that I only paid 30 for one! Which I had already done so I made absolutely no loss but it was a lesson learnt. Never pay 30 pounds to get your nails cut. Pretty nails is good otherwise and I would have come back but only because of their mistake they made a huge loss.