DNS zone file ANYMORE hosted by SiteGround.com

Hi All,
in the past I was hosted on SiteGround.com and was active a cloudflare account.
Actually I’m not hosted anymore with SiteGround.

Accessing to Cloudflare on DNS tab, now I see this error message:
Your DNS zone file is hosted by SiteGround.com, a Cloudflare partner. Changes to your DNS settings must be made through them.

Unfortunately I cannot anymore access or made any change to SiteGround…
Could You please fix/reset and allow me to restart again to use Your service?

We don’t have access to do anything to your account, you would have to contact support for that, however I doubt they will be able to help much in this case.

You will probably want to re-add the site using a full nameserver setup rather than a partner setup.