dj not giving deposit back

I hope I don't sound insensitive or bratty in this post. But we chose our DJ, put down our "nonrefundable" $300 deposit. He sadly passed away and the wife is now in charge of the business aspect, while his friend (or sub contractor) is helping and taking over all the events. We waited to make any decisions because we know they're grieving. We did want to meet with him though, set up a time. The day came and he kept pushing the time back, so he was going to be late and we were already at the place and would have to wait another half hour. Last thing I want is someone to not be punctual on our wedding day... we called the wife and she said the deposit is non-refundable, but I feel like these are unusual circumstances and there should he ask exception... is anyone familiar with the laws about this?