I can not cancel my subscription

I deleted all my lessons after getting this notification ’ To downgrade you must have fewer than 5 imported unshared lessons. Delete imported unshared lessons until you are below this limit then downgrade again. ’ but still it gives the same notification.
here is it learning platform or it is a scam ?
Someone could please help with this problem ?
Thank you in advance

I checked your account and you did cancel subscription successfully. Your account is scheduled to drop to the Free plan on January 30, 2022.