Hello @Yuryukchi ,
Welcome to the community,
Have you checked the breakdown of your bill? As you have to pay one month in advance, then that is why your first bill will be higher, then next one should be lower.
If you have anymore questions, you will have to speak to customer service, as there is no account access here.
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.
