You should ping them again once some time has passed, just to inquire as to how things are going. It will only take you a moment, and there's a non-zero chance

You should ping them again once some time has passed, just to inquire as to how things are going. It will only take you a moment, and there's a non-zero chance they may have grappled with the problem enough to have changed their mind and be eager to speak with you.