what the f** do i do about group chat calls????

hello reddit

im a teen and im facing an issue with group calls

my classmates got ahold of my phone number after a not so nice classmate of mine basically leaked it to everyone

theres one kid who keeps on spam calling me via starting a group call with some other random person and i dont know what the hell to do about them!!!

ive tried blocking all people who call me i tried turning on do not disturb to no avail! since they keep getting others to add me

the fact that group calls can literally break through focuses is more frustrating since it makes it impossible to ignore them since then can just ring me again over and over

whats worse is that its the same on the desktop app i just try and game and they just keep on ringing me

group calls are badly designed and thats entirely metas fault but is there anything that i can do???

thank you!