Games : How can i delete my coc linked from ios to android

I played coc in my two gadget, my iphone 4s ang i linked my coc to my android tablet. After a week i lost my android tablet. Now my problem, everytime i open my COC games there's a message pop-up in the screen of my i-phone saying that my coc are open in other device. I try to reload so many times but coc in other device are still open, and the one who steal my tablet are playing my coc... How can i unlink my coc to that andoid tablet. I don't want to re-start again my coc co'z i upgraded it already to th8.

Kindly help me... Tnx Mr. Virgo