First you could go out and talk to her straightforward to solve the problem. If she doesn't listen to what you say, you could tell your former teacher. Second, you could sit in another place to avoid staying near her. Or you could try using earphones, listening to loud music so you won't have to hear unwanted noise. Hope aforementioned solutions could help you.
I'm in class and as usual the girl sitting in front of me keeps playing music during the lesson. Although she uses earplugs but I still feel frustrated and can't focus on the lesson. I always tried to ignore her but now I can't take it anymore. So I decided to asked her to stop playing. She happily said okay and stopped. She said next time just tell her straightforward and she will happily agree.