Call salon directly instead of booking here: treatwell system and the salon booking system do not speak to each other, so if salon staff do not check regularly enough you might be unpleasantly surprised with a cancellation. I had an event that night and booked a blow dry only to get a call later (an hour or so before appointment) to say that they cannot accommodate me as somebody just booked my slot by calling them directly and they did not see my booking on treatwell until later. I was offered to choose another later slot but my work schedule didn't allow it and it was also too late to book elsewhere. Very poor customer experience - blaming it on treatwell as the caller from salon did is not good enough - it is YOUR salon so you are the ones responsible for sorting this out.
The booking had not fed through from Treatwell however the staff in the venue tried very hard to accommodate me and offered a complimentary manicure while I waited