What is the ruling on subscribing to a movie service for the purpose of study, then upgrading to a higher package by paying the difference, then being surprised by an unrequested upgrade from the administration that led to a reduction in the duration instead of an increase in features, so is it permissible for me to benefit from the subscription after that?

It is permissible to subscribe to packages for watching permissible movies for a fee. Moving from one package to another by paying the difference is permissible, as it constitutes the annulment of the first contract and the formation of a new one. If the upgrade occurs without the subscriber's request, it is not binding on them, because contracts require mutual consent. If the subscriber accepts the offer of the new package with a reduced duration for the same price, the contract is valid if they consent to it.