How to get rid of the Fbi scam on a kindle fire hd?

Yesterday I was watching my usual then out of no were I got a message that said I was trying to look at child pornogrophy and that I have to pay $500, I am a kid but I wasnt looking at it and now my kindle is locked intil I pay, how do I fix it?
Added (1). I cant leave the lock screen because of the thing and I cant exit it out
Added (2). It also said that they got my face and address but the face is fake because my camera dosnt work
Added (3). This is what it says (As a result of full scanning of your device, some suspicious files have been found and your attendence of the forbidden pornographic sites has been fixed. For this reason your device has been locked.
Added (4). there is alot more but its too much to type (also im 13)

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