Internet connection becomes very unreliable in May 2018

Earlier the airtel connection was fairly reliable, however in May 2018, it has become extremely unreliable and is becoming very slow after 1 minute or so . The data transfer is suddenly dropping to zero, wasting the time of the internet user. The problem is very severe after 8.30 am during the day.
So other than checking the emails, it is not worth spending much time online, as connecting repeatedly will take a lot of time which can be used more productively elsewhere.
For example writing content is more useful, as the number of pages are considered for seo purposes , however spending time online does not help in increasing online income in any way