Some of my mates are starting to try and get me to become christian and its really annoying wat can i?

ok so im an atheist and most of my friends are christan and lately they have been trying to get me to go to youth group listen to christian music and reading me stuff from the bible and its starting to annoy the heck out of me ive told them im a atheist but they dont seem to hear and keep talking about God and how im probably gonna go to hell because i dont believe what can i do to make them stop cause its getting on my nerves and ive hung up the phone on some of my mates because they kept talking bout it after i warned then i would hang up if they kept going on about it please help as i asked one of my mates bout it and she said she thought it was impossible to not believe and that she was kinda creeped out by it