Probable hacked network in India

I am from India and even though I am a concerned citizen when it comes to my online security, I'm not a security professional. So any help or insight into my situation will be much appreciated.

I have been using a broadband connection of a reputed national ISP - Airtel. Recently, I have been experiencing sudden website redirects. I could be on Google or Apple and suddenly find myself redirected to: http://mobilegames.candyoyo.com/fish-resort/?host=m.candyoyo.com&locale=en&p=m.candyoyo.com

This has been happening more often per day than it used to when it began. I did check the website and it does seem suspicious.

Is it possible that my modem/router in some way has been compromised or has the entire network of my ISP?

Thanks and regards.