Electricity Issues

so lately i have been having this electric issue in my home. lights blink power goes out breaker is ok so i was wondering what was the issue. then i started scouting by tuning of one by one which takes more power. i tried by turning off the fridge. power still goes when i turn on my ac so i tuned both ac and refrigerator off still power goes. next i had to bring an electrician from the company he said all was ok by showing me the meter he had. so i was awfully confused so i asked my brother what to do. lucky for me he was an electrician he replaced the breaker 1st so after that i tested but still power goes finally he replaced the ELCB and  i thought everything was back to normal but still power goes so after an investigation from the electricity company we replaced the electric meter and now everything is fine