Coin Master complaint: My friend keeps attacking me and I can’t attack back

My complaint:

So, my friend can attack me and raid me but when I click on revenge it says connect lost, please try again later. And then I switch targets and it works just fine. This is frustrating as they can attack me and I can’t. It’s just so stupid. I even unfriended that friend on Facebook and blocked them but this keeps going. Fix this thing

Suggested solution:

Do something about it or let me switch my progress to another Facebook.