groupontakes the award for the worst service ever!

I purchased massage vouchers from Groupon not long ago and when I called the massage parlour to make a reservation I was told that they no more take groupon vouchers and the lady then told me that she told groupon to inform the customers which they never do.then I tried calling customer care that never answers then I sent an email where they rep**** say they would call in 3 to 4 working days which I'm still waiting for the call.i think this is poor service as my money is involve and I feel insecure about the whole situation I feel like groupon is a ****. I really wish they resolve this ASAP