How to remove www after deactivating Cloudflare?

Hi

I enabled Cloudflare through Siteground to test the Free CDN and deactivated it afterwards.
I might have agreed to something I didn’t want and now my url has www in it (https://www.myhouse.ph/)

I already deactivate Cloudflare through Siteground and it still doesn’t fix the issue.

I also want to know if this is harmful to my sites SEO and needs immediate action?

I’m no technical person. Please point me in the right direction.

Thank you.

If you’re no longer using Cloudflare, then you’ll have to get help from Siteground.

I suggest that people who want to use Cloudflare sign up directly with Cloudflare and add their site here so they don’t have such restrictions, like a forced ‘www’ for their website.