Troubleshooting roof water leakage problems

Initially the domain investor thought that there was some hole in the roof causing leakage, however the problem is more complex.If there was a hole, the water would drip whenever it rains, which is not the case.
Only when it is raining very heavily for a period of time, the water is dripping from the roof
So though a pipe has been installed to drain all the water, it appears that the water is accumulating on the roof and is not being drained out quickly enough, so it is saturating the roofing and dripping into the walls

It is very likely that the pipe path is clogged, and it has to be cleaned, finding a person who will climb on the roof and clean it is a major challenge in goa, for an engineer held a virtual prisoner by raw,cbi, ntro, security agency employees to cover up the google,tata masterminded sex, bribery racket, financial fraud since 2010.