Hello @TurkeyJohn ,
Welcome to the community,
If your number is not recognised in the account, I would suggest you speak to customer service and they can sort this out for you, you can only do this if you are the account holder, once that is done, then using the app, you should be able to see your bills, choose the one you want to see and download it, the same if you do this via the website.
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.
