Hi John! Do you mean that you already have hosting with us at InMotion and you want to change the domain name for your site to your newly purchased domain name? If so, please see this article on changing your primary domain name.

If you mean that you've recently registered a domain with us and want to transfer your website to InMotion, here is our guide on how to transfer your site!

On most hosting plans, simply log into cPanel and use the multiphp.ini editor to change the site settings you need to change! If you are on an older, VPS or Dedicated plan, you may need this guide on how to change the php.ini file manually, but newer VPSs and all shared plans will have the multiphp.ini editor available!

Sorry to hear that you're still having trouble!

The first thing I would suggest you rule out is the possibility of bot traffic affecting your site's available CPU and bandwidth. With those statistics you posted, your account is straining to keep up with the number of site visitors. If this is legitimate traffic, the solution will be optimizing your WordPress site and, if needed, upgrading the account so that you have more resources available. 

Unless you have already actively worked to prevent bot traffic, it's likely that a meaningful amount of that traffic is artificial. I would suggest checking your traffic with AWStats, determining if it is legitimate or artificial, and taking steps to limit bots. You should also look into the free tier of CloudFlare, which can be quite helpful in mitigating the affects of bots! You can treat bots as essentially the same as a DDOS attack when it comes to troubleshooting and preventing them.