So sorry to hear that. Sounds like your Ex is playing games and trying to hurt you instead of doing what's best for your son. That's not the right way to parent. Although it doesn't help your situation in terms of the game, my guess is she's going to catch some grief with your son for this.
Because I'm a guy/fixer and apparently have a hard time just listening/empathizing and not also helping...any chance you could contact them to request a different game? Or sell the tickets and use the money to buy tickets for a different night? The cell phone provider / contest company / NBA team office might be accommodating.
I reached out to Verizon. That’s where we won the tickets. They were able to get me tickets to a game a day I have my son. Great seats 4 rows behind the visiting bench. I didn’t tell my son yet. I want to surprise him and make sure the ex doesn’t try to sabotage it.
M:42 XW:41 T:19 M: 15 D:13 S:10 BD: 8/10/18 Moved out: 8/18 Moved in: 9/18/18 Moved out: 4/22/19 D papers signed 11/4/19 D final 3/18/20
