Tata DoCoMo Photon+ — TATA Photon + Charging money when their internet never works awful Service

I had purchased Tata Photon + postpaid its works well first 10days after that its never works i complained for this they send an engineer he said sir i will change your device and its will work he changes device but internet not connected i complain again Engineer called me and said sir these are where you using we have weak network access there we will fixing this issue in 7days but my problem not shorted till 4 months they continued charging money i said them to disconnect the cc person told me sir you can use it at other places or at other city what a foolish answer for using an internet i travel 100 km daily what a uneducated person recieving calls at CC its really aweful service from well known brand stay away from Tata Photon+