Using apple iPhone 8+ running 12.2 spent 2000 theonite crystals on the valentine relics and when I went to open them the game crashed and when I reopened the game I was still short 2000 crystals and I didn't have my valentine relics
When you spend Theonite on Relics, they are opened and the rewards are added to your collection the moment your Theonite is removed. You don't actually have to see the Relic opening screen to get your rewards.
So, the rewards will have been added to your collection silently in the event of a crash.
I compiled a list of the Fighters you received, and I sent it to you through DMs.