Meghbela Broadband — Complaint about problem in net service from 6/9/16

Address:	712235
Website:	meghbelabroadband.com

Sir i beg to state that from 6th july 2016 i am not able to use my net not by wifi nor by directly i have rang to your helpline no. but they are unable to solve my problem.
They adviced me to re install lan adapter as my lan is taking a wrong isp by default.
Pinging shows earlier when called customer care on 6/9/16:
Pinging 192.168.129.1
Pinging 192.168.0.100 destination not unreachable.
But
On 7/9/16 shows
Pinging 192.168.129.1
Pinging 192.168.129.155 destination host unreachable.
Further while trying to open pmpl official webpage it says
The website took long to respond
And doing trouble shooting gives
The computer is connected to wifi but the dns server is unreachable.
Please help me to get rid of this problem or otherwise i will be forced to change my internet service provider.
Details:
Login id: debayan_ww
Package : popular home package rs.447 (inclusive service tax)

Mobile:[protected]