I'm am really annoyed as I pre- paid on Treatwell for a full colour, cut and blowdry and yet this is now the 3rd time I've been asked to pay more for my colour once I've had my hair done.This time they asked me to pay an extra £20. I refused.The price you pay on Treatwell is a discounted price and I should not be asked to pay extra.If you need to put the price up then change the prices on the Treatwell app, don't think its fine to ask people to pay extra, as this is not ok.