Not Answering Their Calls

I made a booking for a photoshoot through Groupon, paid the amount required, but when I called the number provided they do not answer my calls. My reservation was for the 16th of January 2016, it was my girlfriends birthday and therefore wanted to take her out for the photoshoot.<br> <br> I have found no joy because Este Pieters Photography have not contacted me ever since the booking was made, and I just can not get hold of them.