Hacked and SEO Crashed

I am getting a weird Google result, its showing a japense page on google. I was hacked but I am not sure what all I need to do to fix it. I have errors in defender pro but nothing that looks to be the culprite. I need a few things:

1. Support on the hack, helping insure it doesnt happen again

2. Help with the goolge results that I lost, I use to be tops in my area, now I dont exist, almost like I got deindexed.

3. I am getting some search console social engineer warnings but I am not sure what do to do fix it.

I am willing to potentially hire someone to help.