Worst service and punctuality

Booked an appointment almost a month in advance, on my way to the appointment they phoned me to ask if I can move my appointment to later that day, I said no, I have a range of things to do after my nails. They said okay they understand, came there waited 20 minutes for my nail tech (Polite), only to hear from another nail tech that they fitted someone in who is doing an ombré (more money) so I took my things and left, they receptionist said that she’ll send me a voucher for the inconvenience, up until today no voucher. They can’t even, on every time I’ve been there, do the most BASIC nail art and never have the colour you want. Look at local nail salons instead of supporting people you’re going to be dissatisfied with in the end. This is the Somerset west branch