Recent charge of 99 cents per month

This is primarily a user-to-user support forum; other Apple users like you. We don;t have access to your charges but the following may help.

You can use the following to see if you have the free 5GB plan or an upgraded storage plan (and to downgrade if you want): Downgrade your iCloud storage - Apple Support

To see what you are using the storage for: Manage your iCloud storage - Apple Support

If the charge is not for storage, see: See or cancel your subscriptions - Apple Support

See the following from my first reply:

You can use the following to see if you have the free 5GB plan or an upgraded storage plan (and to downgrade if you want): Downgrade your iCloud storage - Apple Support

To see what you are using the storage for: Manage your iCloud storage - Apple Support

If the charge is not for storage, see: See or cancel your subscriptions - Apple Support

A 99 cent monthly payment is most commonly for iCloud storage. If you do not need the storage space, you can downgrade to the 5 GB free storage.

Have a look at your Purchase History:

See your purchase history for the App Store or iTunes Store - Apple Support

Re: I saw that but I don’t know why??

Saw what?