Hathway Internet — Internet not working (bad service)

I HAVE TAKEN INTERNET SERVICE FROM HATHWAY internet service but not working for last two month only connect for one or two hour in a day and rest of day always shows massager UNABLE TO CONTACT SERVER.
I HAVE DONE SO many complaint . but the person (dealer not attending well)

Dealer name is KP MOBILE NO [protected] AND LAND LINE NO IS [protected]

Now i wanted to back my montly charges rs-550/- for two months and security deposit rs-1700/-

please take action the said service provider

thanks with regards

USER NAME -sagar17

Vidya sagar dhasmana
mobile no [protected]
POcket o 17 A-3 Dilshad garden
Delhi