Modern warfare false ban?

i just got home from my moms ready to play the modern warfare so i try logging in and my email didn’t work so i tried my phone and i logged in i got the newest update and hopped on and it said Sign In Account permanently banned then says Quit To Desktop now i didn’t know how i got banned cause i didn’t even have my pc with me now what is strange is while i was at my moms i was getting messages from blizzard like codes and stuff so please help i can provide any info needed thank you for reading this