Priceline.com review: flight refusing to resolve

I bought a flight from Priceline September 24, 2023 for my daughters matron of honor to fly to SC from Albany NY, for my daughters wedding. On Sept 26th, Meghan Lovering, my daughters matron of honor, called and she had a medical emergency, had to have emergency surgery. She could not come and missed the wedding. we lost money for all the others things surrounding her not being at the wedding, including $470 for a flight. I was told to contact delta and American Airlines and if they approved the cancellation, then Priceline would be willing to review and see if there was anything they could do. After talking to Delta and AA, they agreed it met their standard for approval and agreed. I called Priceline and they told me they could cancel and give a credit to Meghan Lovering and if she didn't use the credit within a year, it would be gone (Priceline gets $470 free dollars). I bought the ticket with my credit card and I feel that giving credit to Meghan, who was only coming for a wedding (that she since has missed), and will not be coming at a later date, was not acceptable. She did not have the money to come so part of the gift to my daughter was bringing Meghan. So, no resolution came of this many hour phone event. Reasonable airlines agreed, Priceline refuses. I told them I was taking a mission trip to Kenya in February 2024 and would be applying any credit to the purchase of that ticket and they still refused. I feel that a credit in my name or a refund minus any reasonable fee for cancellation would be acceptable as well, a fee for name change would be agreeable as well. Can you please help with this matter? The trip was from Albany (Sept 30-Oct 1) to GSP and back to Albany. Delta flight 5194 at 7am from Albany and AA flight 1164 6:33p from GSP back to Albany. Please help. [protected]@gmail.com and my phone [protected]