supply of defective phone receiver

Location/place: golaghat,assam

Name of company/service: MTS,assam,india

i have received a connection(internet) from MTS,under assam circle,and having problem since from starting period,
prob 1:- receiver problem
prob 2:- not a single responce from costomer supporting executive
prob 3:- network problem
prob 4:- battery problem
Phone No-9134453347