I got harrassed by the dudes in my maths class because I used my phone

for context: I live in England and my school doesn't allow phones, so we put them in a bag that goes in a safe. 
Yesterday (last Friday) I decided to sneak my phone in, since my friend was also doing so, my friend got caught though because she forgot to put her audio down while playing Gacha Life (LMAO), but i was more sneaky. while we were meant to be doing work, i decided to use my phone, but one of those REALLYY annoying dudes went behind me and noticed me using my phone and started telling EVERYONE i was using it. The annoying dudes started telling the teacher i had my phone hiding under my jumper but i just said i was using my calculator, and because the boys were just bullies the teach just shouted at them. i hid my phone under me but they were SO desperate to catch me using my phone, looking under the table and keeping their eye on me so i couldnt even move it somewhere safe, and they were basically harassing me and kept talking to me and trying to prove to the teacher i had my phone THE WHOLE FUCKING TIME while i was quite literally shaking out of fear and telling people i was just using my calculator, i literally SMILED at one of my friends/classmates as they were cheering me up and this dude called Sam told me to "wipe that smile off my face", like tf?? so desperate to see me miserable. While we were packing up they kept watching me and i knew that if i tried to pack up now they would see my phone 100%, so i told them to kill themselves and put my head on the desk til they left so i knew i wouldnt get caught, and once they left i packed up my bag and put my phone in it. My friends told the teach what happened and she said I can think about what she's gonna do about it after half term, since i said if they get in trouble i might just get bullied even more by them. So yeah, they were SO desperate to catch me using my phone but they didn't lmaooo, gg furkin ez

also just some other stuff, the harassment part may or may not have been an exaggeration, but my friends said they were but I'm still unsure.. Also I'm calling some of my classmates friends but I'm also unsure about that because some of them might not consider me friends w them so I don't wanna mislabel anything. Hopefully someone from my school doesn't somehow find this and uses it as proof that i was using my phone, but this website is niche anyway so i doubt that would happen.