Who are you talking to? It's only other end users like yourself here...
Nobody is forcing you to pay for anything. If you are referring to the free iCloud storage you were given as a former MobileMe user, it has always been clear this was a temporary upgrade and at some point it would revert back to the standard free 5 GB of storage.
If you don't want the optional, additional storage, just do nothing, and you'll go back to the 5GB option.