@Mohsen_Latifian ,
What subscription is this? Is this for an app? If so you should be able to do this via the app or by logging into your account via the website.
For contract, you need to ring customer service, as we have no account access, not sure what subscription you are asking about, so would need more information to help.
To contact EE customer service dial 150 from your mobile phone or ring customer service for free using Skype or another phone: +44 800 079 8586 or +44 800 956 6000.
