Inexcusable Service

I made an appointment to redeem a voucher with the Loenesa Spa which I had made with Groupon. The merchant did not pitch up for the appointment or contact me to cancel / re-schedule. I tried to call them while at the closed salon on various contact numbers but they didn't bother to pick up. A beautician called Lehana eventually SMS'ed me later in the day to say they had a geyser issue & she was \willing"to re-schedule. I'm not sure why she did not contact me to cancel the booking"