Vivoactive 4s crashed during swim

Please help. My garmin vivoactive 4s (bought in Feb 2021) shut off in the middle of my swim yesterday (it was at 80% battery when I got in). When I plug it into the charger the green triangle will sometimes appear then flash the battery sign and then shuts back off. It’s still plugged into the charger. I’ve cleaned the charging contacts and checked the pins on the charging cord but nothing is working. I’ve also tried to reset the watch by holding down the two right buttons. It flashed the green triangle three times and then flashed the battery signal again and went black. 

Any help is appreciated!