@selinarosella85 : What exactly are you trying to do?
You can't have another person access your EE a/c w/out, obviously, giving them its creds. However the A/c Holder can call CS to appoint a 3rd-party to handle day-to-day aspects of their a/c over the phone with CS on their behalf. They will not be cleared to affect contractual matters, like cancellation or upgrades.
If you think I helped please feel free to hit the "Thumbs Up" button below.
To phone EE CS: Dial Freephone +44 800 079 8586 - Option 1 for Home Broadband & Home Phone or Option 2 for Mobile Phone & Mobile Broadband
ISPs: 1999: Freeserve 48K Dial-Up > 2005: Wanadoo 1 Meg BB > 2007: Orange 2 Meg BB > 2008: Orange 8 Meg LLU > 2010: Orange 16 Meg LLU > 2011: Orange 20 Meg WBC > 2014: EE 20 Meg WBC > 2020: EE 40 Meg FTTC > 2022:EE 80 Meg FTTC SoGEA > 2025 EE 150 Meg FTTP