How to get divorce with my wife who is at faute. She contacts her lover through phone.

I am civilly married since ten years and I know that my wife is not loyal to me. I have two kids with her. She often contacts her lover through phone and I have the records. I am opting for a divorce sine she is less caring to me and the kids. She has stopped to do household works and especially cooking for me and the kids. She ill treats the kids of gender years. Advise me sir, how to proceed. Thanking you in advance.