You are gambling and losing. It’s as simple as that. Yes, someone else gained at your expense but that’s the risk you took.
You asked Support about chargebacks etc and they gave you the standard answer. They didn’t look to see whether you were breaking the rules or not.
I’d be surprised if it wasn’t the buyer who reported your account by the way. You made scamming you easy by not knowing Fiverr rules. That’s on you, unfortunate as it sounds.