@Afg4ir , you need to make sure that you have the latest EE App for it to work.
You have written conflicting messages, you want the old app then you want the old account, please enlighten us your problem.
To contact EE customer service dial 150 from your mobile phone or ring customer service for free using web based app or another phone: +44 800 079 8586 or +44 800 956 6000.
