Question Is my device at risk

This might not be the correct section to post this question but here is my problem.

As well as pc gaming i use a lot of games on my android tablet. In a well known game a player has started doing things that is really freaking players out.
Whilst in main chat he will tell you what device you have the game on , he can tell you how many special items you have in storage and not even visible on layout , he told me within 1 mile where i live , he can even tell players what they typed in group , 1 to 1 or private chat.

If this is possible in a game then god knows what else he can do ....

How can i stop or even find out if my tablet and its connects have been got at