I LOST MY CONTACT AFTER DELETING MY MAIL ACCOUNT KINDLY HELP ME I LOST MANY CONTACTS

Your contacts are synced with this email account. To add them back, log in to that account in Settings > Accounts&Settings on the device.

Well, you have not told us where you house(d) your contacts.

It sounds like you house your contacts on your email account ... so naturally, deleting that account removes all your contacts.