Samsung Stolen but can see activity via gmail..what now?

My house got robbed the other day. Amongst some of the things they stole, was a Samsung Tablet which is connected to my gmail. To my surprise and disappointment, the thieves started using the tablet and they connected it to Internet (via WiFi or sim, cant tell..I did not have a sim in it). Recent activity in gmail shows that the tablet sincyed few hours ago but
Find My Device "Can't reach deice" so it is useless..at least for now. Recent Activity shows Location: Only the country I live in,...

Samsung Stolen but can see activity via gmail..what now?

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