Nice shop disappointing service

I brought my shoes to Nick and he was very pleasant and honest in the way that he said fixing the soles of my shoes would be particularly difficult given the composition of the material but assured me that he could do it. I picked up the shoes a week later and was happy to see the holes and cracks sealed and paid him the $45.00 for the repair.
Within a day the repair failed and I had to make the trek down again. When I picked up the shoes the repair work looked very sloppy but wondered it that meant the repair would actually last. I decided to wear them in my house for a couple of hours before risking having soaking wet feet all day again... within the first few steps the repair instantly failed and cracked away.
Once again I called him and asked if he would provide a refund for the work that he did and was told it wasn't something they did but he would repair them again if I wanted. Seeing how quickly the previous repairs failed, I felt that the hour and a half I would spend driving there to drop them off and back to pick them up would be wasted.
The shoes are now in the garbage and $45.00 wasted along with my time and gas/parking costs.
I understand that at times things don't work but I'm very disappointed that he wouldn't refund money for a service that wasn't delivered.