my snapchat is hacked what should I do??

From 2 3 months someone else is logging into my account and even after removing him from saved login info ans session management and chnge passwords email and number still someone is loggin into my snapchat i do not want to dkt my account and he share anything to my frnds and family he also blackmailed me that he will share my pvt imgt with my family I tried everything from last 2 months asked my frnds to help me they also did the same thing changing pass email number but nothing happened yr he still logg into my account 😩😩😩Help me I do not wanna dlt my account