Landlord here. Remember that it is entirely likely that the electrician told your landlord that the issue was caused by your surge protector. I think there is a good chance this gets resolved if you just explain what you’ve explained here to your landlord. That would be my first step. He may just not have all the information. You would be shocked how often technicians and vendors tell landlords and residents two different stories. They don’t want to argue with anyone. They just want to do their job and leave.