Can not loging

Hello.
Yesterday i activated my account after long time and i played in wow classic a bit. I log of and in morning i wanted to play, but i can not log in. I now download some free VPN just so i can log in to battlenet account on forum. Even on forum will not be able to log in. Like there is connection issue.

Error BLZBNTBNA000003E8
In log in i get BLZ51901016

There is no way i can even contact you without vpn

I can not even writte ticket.

Please help me