Problem Problems after factory reset Huawei P9 Lite phone


The wife's phone, a P9 Lite, keeps restarting so I did a factory reset. Everything is ok, but after starting I had to put in my gmail account to prove that the phone is not stolen and mine, but it sends me back to the phone, which is the only device used in Google Play.
No phone number or other email address is set for recovery. In the meantime, they blocked access to the gmail account for repeated, unsuccessful login attempts.
I searched but did not find a phone number from any call center from google or gmail, how could I contact them to unlock the gmail account, so that I can set a phone number and another email address for recovery?