Can anda give me advice?

Do NOT just let this slide. Never let things like that slide.
anda can either address them with the problem in the calmest and most mature manner possible, atau anda can simply stop being Friends with them. If anda ask me, anda should try to address them to at least do as much about their perspective on it as possible, just to see both sides of the story in a balanced manner before making any definite decisions. Find out why, and find out if the problem can be resolved for future situations. However, I don't know the story in full, so I can't tell anda what is exactly best to do and the real choice is up to you.
However! Do not lash out in a violent atau disrespectful manner as it will only escalate the problem and it may get anda in trouble as well.

Gah, sorry for the soap box... In a nut shell, I strongly suggest that anda approach it in the most mature and reasonable manner possible and in the extents that anda find most necessary. Evaluate and see if the problem can be and is worth fixing, and use your best judgement to make decisions afterward.

Leave them and don't make any contact with them whatsoever, there not your friends, there just douchebags that want to push your buttons so they'll think you'll go over the limit.

Tell them they're shallow fake assholes who deserve the ultimate punishment of spending the rest of their lives listening to nothing but Taylor Swift~

Dump em! Kick em to the curb! Break their itty bitty hearts! Say it however anda want. Friends are supposed to make anda happy not sad!

I say ditch them at a konsert and alih to london
if anda live in london, Your in good hands -thumbs up-

well if theyre just "friends" (i assume that the quotation marks mean theyre not very good Friends to you)then anda should get rid of them. point being "friends" with people who write anda mean notes and call anda an idiot.

"Dump" them, if they can't be nice they don't deserve your friendship.