Disappointed

I bought a voucher via wiki deals, my wife called them for reservations for the 21st at 2pm which they confirmed we can come now they asked her to send POP and voucher number for booking which they struggled to open attached PDF now they giving us different times and slots. We have been calling since last week, send emails but only to be told today Saturday is out only have availability at 4pm or Sunday as if we don't have life's to live after contacting them since last week already.