Hello @Bongo807 ,
Welcome to the community,
Did you first activate and use your SIM cards before going abroad? If you did not, then unfortunately your SIM cards will not work until you return back to the UK.
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.
