Someone changed my gmail password

respected sir/madam,
my gmail account i.e <removed by moderator> has been hacked my someone.my recovery phone number and recovery email has been changed by them.please sir/madam help me to recover my account because there are many important things and i used to play Clash of clan(COC) and other many games.my previous password was <removed by moderator>.
sir/madam i humbly request you to get my account back as soon as possible ..please sir/mandam
Thank you !!!!!!!