Failure to refund, respond, provide feedback

I bought a Groupon and specified that it was for a gift. The Voucher went directly to the person I bought it for. But the system is that I have to make the booking for the person I bought it for. This is inconvenient and counter intuitive to both parties. The person I bought it for did not make a booking until the last minute, and then the only available time was one they could not go. Now Groupon is refusing to refund me for the voucher, even though the Consumer Protect Act specifies that the consumer must be refunded if the service they bought was not delivered. The first consult I spoke with was not able to give me a reason why they cannot refund me, and the supervisor i spoke with promised to respond by 15:30 on 13 April. She only called at 16:00 when I was not able to take the call, and has not seen fit to call me back. I am unable to call her as I only have the call centre number. Unacceptable customer service and unacceptable business processes. I will not be using Groupon again. I have already unsubscribed from all emails and would close my account if this was possible.