Did you register the card before? If no, then...

Did you register this card? If yes, you can call and terminate the card. I don't think it can be transferred to new card, I asked before but I could be wrong.

If it's not registered then I think no other way to prove it..

good that you registered before.

email?? you should have called to block the card right away. you could lose a lot (even for an hour) if the person who picked up your card went to shopping at hypermarkets or pharmacies, or even dine at certain restaurants. after you called, your card balance will be deducted with an administration fee and termination fee, and the balance will be banked-in to your bank account.

lost = stolen? misplaced? left unattended?

for anything emergency, pls call the respective merchant or banks or issuers; should be your utmost prioritized action.

posting the question here (e.g. 2nd opinion, suggestion, recommendation, etc) should be your secondary task; not ask here first and then take/figure out action later.