Commissions claw back

Can anyone share their experience? Work in SaaS, new customer ghosted accounts receivable team. Have had zero successful contact with them, they never paid a cent. Now the company wants to claw back the commission. Which I understand even though I feel like there must be better ways to escalate a legally binding contract, like collections etc.

There’s no reference to commission claw back in the contract / comp plan etc.

Do I have a leg to stand on or should I concede?