no response to query

On 6/12/15 I purchased a pendant and earring set on Groupon. I mistakenly purchased this item twice. Upon realising my mistake I sent an email to [Email Removed] try and cancel the one order. I received an automatic response saying I would receive a reply from a consultant within 2 days. This didn't happen. I've subesquently sent further emails and still no response! I've tried calling the call centre but the voice message says they are experiencing high call volumes and to send an email. This is extremely frustrating! This was my first time buying an item on Groupon and I will never do so again!<br> <br> Regards<br> Charlene Patel