Hello @ajay15 ,
Welcome to the community,
Have you looked at the instructions for Android phones? You should give you the answer how to get the phone rebooted, you would need to factory reset, I believe. I do not have Android, but Apple.
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.
