Vivo Mobile India Pvt Ltd — Vivo V1 Mobile purchased not operating properly

I felt really disappointed after purchasing your company mobile phone... This is like a worst experience a consumer can get... I purchased Vivo V1 Mobile from M/s. sangheeta store, forum mall, kormangala, Bangalore on 18.10.2015 . from the next day of my purchase I am continuously facing the problems in my phone.. Hanging issues... Screen touch not working problem .. No operations in phone at all... I want my phone to be replaced back or my refund should be done... Otherwise I will be taking legal action against company and M/s. Sangheeta Stores, Bangalore... Reply awaited ... Most urgent Yours Sincerely Arun Pratap Singh Assistant Enforcement Officer Enforcement Directorate Department of Revenue Ministry Of finance Bangalore Zonal Office Bangalore Mb: [protected] [protected]