Cannot give me ref number so I can pay,lost credit

I ordered an item this morning and opted to pay via EFT. I closed the tab before I had noted the reference number. I emailed Groupon and no response. Waited in the queue on the phone for ages then got told they cannot give me the reference number so I can't pay.<br> Worst is, I used R299 of my Groupon credits on this order. I was told I must order again meaning that I must pay R399 instead of R100. They can't cancel my order and my credits will be reinstated in 5 DAYS meaning I lose out big time as my deal expires in 2 days. Oh my goodness, Groupon. I am so updet, I have no words. I was told bluntly that you cannot help me. This is so shocking honestly.