TexturePack Bug

So I was getting this optifine pe pack I downloaded it and got it on my resources as i do it everything's upside down I go to play that's where I lost there was no exit button so I couldn't play i tried to delete it but it was the same so please add the reset global resources again so I can delete it please mojang mcpe is important for me https://youtu.be/ape4VLMCOSI