@Jana76 , have you checked here:
https://coverage.ee.co.uk/coverage/ee
You can also report it and get updates if you register on that site, as it will depend where you live etc.
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.
