get my site back up online

I am in need of a freelancer to help me get my website back online. My website is built on the WordPress platform, and it has recently gone down for some unknown reason. Fortunately, I do have a recent backup of the website, so all the data should still be intact. I am looking for someone with experience troubleshooting issues such as this, as well as someone who can quickly and efficiently bring the website back online. Thanks!

My Hosting company Koddos said:

The issue is not on the server side, but on my site side, It is using all the memory that is assigned to my host.
Can you fix my websites script and optimize it? I do not know how to.

My site: https://gregforex.com/

Regards,
Shawn