Please be careful and never post your unique IMEI number(s)! It is interesting, that you have a 7-digit number in your Fastboot menu. Have you tried to input the one from the settings? You have to find the other serial number, I think it is under the ,,IMEI information".
I m try all numbers what I found but after flash files I get same so serial dont match I was try send SN number with 0 before and 0 after but dont matched again :/ I dont know what i can do.