I need to cancel my iCloud I no longer have that phone or iCloud account how can I do it

about your appleID Recover Your Apple ID - Apple

cancel Downgrade or cancel your iCloud+ plan - Apple Support

if all else fails then if it was me then I would contact apple

Apple Support

You may

• How to downgrade or cancel your iCloud+ plan on your Mac
• How to downgrade or cancel your iCloud+ plan on your Windows PC

If you already tried (to no avail) the steps provided in the support article that led you here, contact Apple Support directly and explain your problem, using this link:--> Get Support

Regards

Giulio