Maintenance people came. Checked all the boxes. All 3 of them spoke to each other in a language I don’t understand a thing and went back. The gentleman from Electricity Company was also here at the same time and said nothing wrong with main power connection and the issue is with some breaker inside the box fitted outside the house. Apparently the guys from maintenance company had gone back to bring the replacement breaker. So, still in the dark inside the house, waiting power to be fixed.