Why did I experiece such SEVERE pain with Kor whitening?

Dr. Kurthy,I was extremely excited to use the Kor whitening system. I am a coffee, tea, and wine drinker so my teeth do have some staining. I followed the directions exactly, put the trays in and went to sleep. I woke up at 3:30 a.m. in some of the worst pain of my life!! I have given birth to three daughters and the pain rivaled that!!  It felt like someone was digging out each tooth individually with a knife! The pain was shooting into my jaw and broke through all pain killers I took. I spent $750, a good portion of my monthly income. When I called my dentist that very next morning there was no offer of a refund or any sort of compensation. The idea of putting those trays back in my mouth sounds like pure torture. I was under the impression that Kor was painless. What do you suggest or recommend? The idea that I am just out $750 does not sit well with me.Thank you for your time, any comments would be greatly appreciated.Katheryn