Gps watch

I bought 2 kids Gps watches for christmas. My daughter's watch's software was defective. I phoned Groupon and spoke to Kurt and requested replacement. Kurt said that the supplier can only be contacted the 2nd week of January 2016 to check for stock and will keep me updated. One day later I received an email saying that Groupon cannot replace my watch but only refund me. I contacted them today and asked why they can only refund me. First they said that Groupon gave instructions to the staff that purchases over Christmas period will not be replaced only refunded. When I asked why, they could not/did not want to give me a reason. The second reason (and easiest excuse) was \it is out of stock". I asked for a team leader and Tasmina said they are not available"