Game dissapiear

Hello so like in the topic. I buyed d4 on its premier but i wasynt so much into it so i stoped playing however now i wantetd to play it with few friends and when i log in to my blizzard app on pc i have my d3 but not my d4 dont know what happend i had my necro lvl 54+ i think 50 leg items and 10mil+ gld i think. Dont know what to do now is it all gone ? Will i need to buy new game ? ryly buged with this all
Any way if some one can help me i would apriciate it.
Thank you