Groupon customer service poor

As happend in January 2015, I'm again forced to use Hello Peter to get reaction from Groupon. On 21 January 2016 I requested credits for unused groupons. Stating in their e-mail that they usually response within 3 to 5 working days, it has now been almost 4 weeks and still my request (#***6) has not been handled. I'm an avid groupon user but this service is really making me wonder if its worthwhile going through all these hassles. Bernard