Change the account of my subscription

Hello fatimahrb,

Thank you for using Apple Support Communities! It sounds like you're wondering how to change the account for your OSN Streaming subscription. To help better point you towards a resolution, we'd like to collect a few more details. Here's some questions that would be helpful to answer:

1. Is your subscription still active or has it expired?
2. Are you wanting to change the Apple ID email address your subscription is billed to or the email address used to sign in to your OSN account?
3. What steps are you taking exactly when the error appears? What is the full text of the error message?

You may also want to take a look if the following support article applies to your scenario:

It says my email address has already been used – OSN Stream

Cheers!