Electrical nightmare help!

After 5 months of mysterious electrical malfunctions in my brand new home that finally led to power outages with no thrown breaker, I discovered siding noises, sparks, and flames inside my breaker box of my brand new home full of brand new everything electronic and smart. Turns out that the electrician forgot to attached the main power supply to the box and it has been arching trying to find a place to go. When the other independent electrician that I called showed up he took it apart and discovered this along with glowing red hot glowing metal. Ive already had to replace 2 of my 5 brand new tvs, my Alexa's keep telling me to check the power supply on devices instead of working properly, my whole house smoke detector system which went off on the construction crew several times with false alarms continue to go off for both fire and carbon monoxide even though they claimed to have fixed it, and during that 5 months my brand new furnace would kick on while turned off blow neither hot nor cold air but say it was blowing heat then turn off all on its own. Does anyone have any words of wisdom as far as what kind of damage if any might have been caused by this and what I can expect in electronics that are still functioning after 5 months of extreme power surges that had my light bulbs getting bright and then dim. I had just switched to all LED lights so for a while I thought maybe it had something to do with that but Im no electrician. Now they're wanting paid a ton of money far more than ever discussed. Not sure I can afford to sue them, but need someone that knows about this sort of thing to tell me if I can expect all these appliances to not last very long, warranties to be void because they were subjected to extreme power surges for so long. Any and all help is appreciated more than I can express with words. Thank you very much.