How can I quit from the game for delete it?

I know this is 2 Years later but... YES you can quit the game and have your settlement deleted! Don't wait 60 days of in-activity for your settlement to disappear and be attacked during that time, contact sos customer support and let them know you want your settlement to disappear as soon as you want to quit the game. They will tell you, to do that you need to answer a series of security questions to prove you are the account owner and after that it will take around 7 days. They will let you know the date your account will be deleted and you can still play right up to that date. You will get a chance between that time to change your mind or after that date your settlement and account will be deleted! There will be no going back after that happens though! *You Own That Data so they have to remove it if that is Your Choice!!

You cannot delete it. I have contacted support and if your account is linked to gmail/facebook etc. it is never deleted. If the account is not linked then it is automatically deleted after few days of inactivity

They require the exact date and time that you opened the account in order for you to delete it. Unless you have a photographic memory, just delete the app and find a new game

It's a game for wealthy kids and adults who are at home and have a LOT of money. Pay to play and win. Our alliance was good in the beginning and they started asking strong rich players in to join. I work, so I did not have hours of game play, and I have cost of actual real world living. Some of these people live in the game like the old WOW days. I understand WOW, but not this game. Smh.