Refund still not processed!

After groupon responded to my first report on the 24th April still I do not have the refund on my credit card, I contacted them yesterday and they were supposed to have called me back but never did. I spoke to Yusuf and then to Seeraj Bawa who indicated that he is the supervisor and who would get someone to call me back. To think that its over a month and I'm paying interest on this money that doesn't get processed for reasons of it being a big figure. The best thing is that I have to be the one calling back and holding for over 30 minutes to follow up on their own mistakes! I demanded that my money be transfered immediately and they said its impossible to do so, after having waited for so long, I was still told about awaiting another 7 days to see the money in my account!!!!This is ridiculous! I'm demanding that my money be paid bakc to me together with the interest thereof!!!