Extremely poor internet connectivity in Goa during the day

Despite paying a fairly large amount daily for internet connection, during the day in Goa , internet connectivity remains extremely slow. After 7.45 am in the morning for the last few weeks in November 2015, it has become extremely difficult to do any work at all as the internet connection is getting disconnected repeatedly.
Either the USB dongle is returning an error, whenever the internet is being connected or the internet connection speed has reduced to zero with no data being uploaded or downloaded.
Online shopping and other online work has become increasingly difficult, yet filing returns online has become compulsory