I am having the same problem at the moment. Don't worry about it. It seems you are using wordfence just like I do, just set the time banned to 30 days. If you lock yourself out for some reason, you can simply send yourself an email to unlock yourself again, so make sure your email system is working properly.
And change the name to something other than Admin and check the option that anybody who tries to login with a username that does not exist will instantly get blocked. Most attacks will be on Admin, but if you don't have an Admin account they will instantly be locked out. That's how I do it and even with a huge ton of proxies there is almost no way to brute force the password