False information, ************* salon

I am from Johannesburg and wanted to do something nice for myself and a friend for Friday whilst I am in Cape Town. I saw a deal for Coco Vogue Beauty Bar and BEFORE purchasing I enquired with them if they have availability for this Friday 24 November as I knew this is the ONLY day I would be able to make it. They responded saying there is availability, I therefore proceeded to purchase the voucher, and now they come back to me telling me that there is no availability. I live in JHB, there is no way I can use this voucher any other time. The level of unprofessionalism is disgusting and now I am not even worth a response!!