Blocked IP address

Hello,

I am the admin on a website for a friend and when we were going through the set up process, he gave me the wrong login info for the back end of the website. After multiple tries to log in, the site has now blacklisted my IP address. There are no plugins for security that are causing this issue and the hosting company says it is nothing on their end.
Does anyone know how the site itself is blacklisting my IP and/or how I can correct this issue?

Any help will be apprecited.

I didn't find the right solution from the Internet.

References:
https://forum.joomla.org/viewtopic.php?t=917252
Motion Infographics Animation Company

Thank you.