Negatively tagging him right now before the deadline will only make things worse now that he already received both loans. He will probably get kicked out of the signature campaign and will have no motivation to pay the loans later.

The "collateral" you have right now is his reputations and participation in one of the signature campaigns. Once that is gone, he will have no point of coming back to this forum

Perhaps @shahzadafzal can also add another neutral tag, showing that he has another loan from him.