ACT Fibernet — Unable to access internet when required

Address:	500040
Website:	portal.actcorp.in

I have not been able to access the internet when required the most. Whenever i need it and i go on to google chrome, it says "network change occured" or "dns probe error". I tried to use the so called "resolver" but it says "connected to the internet". When i again open google chrome again it says the same. And only whatsapp can be accessed on the mobile phone but even google chrome does not open. When the company guy comes to check, it works properly in front of him and for the next 1 hour but after that its the same story again.

I hope you help me how to solve this problem as it becomes very irritating at the time of checking results or filling an online registration form.

Thanking you,
Harsha vardhan