Complaints mean nothing to them once they receive your money

We as friends of 4 visited the estate on the 17th of December 2021 for a duration of 3 days. On The 2nd day of our visit which was the 18th the plan was to do our spa treatments. The ladies at the spa asked us if we could do some of our treatments later as they were delayed and we agreed because we were being nice. They took too long then we asked to come the following day as we were going to be late for our wine tasting. The next day we went to the spa and they said they couldn't assist us and they would send us a email with vouchers for the 2 remaining spa treatments. I have been in communication with them till today and all I am told is the matter is sent to manager who has never even returned a response no appointment no nothing. All we ask is a voucher for the treatments they were unable to give us its only fair as we paid for them.