Dimming and Flickering lights in home
This sounds like an overhead service. The neutral in the triplex could be in bad shape or there could be a poor connection at the transformer. Were the connections in the meter socket checked?
Sound like you have had the panel connections checked a couple of times so I suspect this is a power company issue. Do any of your neighbors have the same problem? If so this is definitely a power company issue.
Answers based on the National Electrical Code. Local amendments may apply. Check with your local building officials.