How to get rid of attacks in coinmaster?

Companions can be expelled from the game when they are unfriended on Facebook. When they are expelled, they will be arbitrarily supplanted by another Facebook companion.

If it's not too much trouble note that subsequent to unfriending somebody, it can take as long as 24 hours until the companions' rundown is refreshed. During this time companion will in any case have the option to cooperate with you in the game.

So unfriending your friend from Facebook can save your village from attacking.But I suggest you not to unfriend your friends because it is just a game and enjoy attacking each other.
                                                              HAPPY COINMASTERING :)