iPad 2 froze wile resetting settings on iOS 9.1.0 beta 4

Hey,

yesterday I installed iOS 9.0.2 on my iPad 2, but after updating Game Center didn´t work at all, so I signed in for testing the iOS 9.1.0 beta version, late in the night I installed it and Game Center was working again, but iPad was incredibly slow, it was freezing and hard to work with, so I tried resetting settings (without deleting my stufff from it) but it froze at one point and it was like that for more than 2 hours, then the iPad battery died, so I pluged it in and when it started again, it started to like reset it again, the line went a little bit further then before, but it stopped there and now nothing is happening...

Please, help me! 😢