Can you give some more information, as you should only be charged / use inclusive data for a skype call.
Is this a video call?
Current Phone: Motorola Razr 5g I also have a Planet Computers Gemini
I work in IT as an Enterprise Messaging and Collaboration Tools Administrator (Office 365, Slack and much much more) and manage hardware both Mobile and Desktop / laptop, my desk is a bit like PC World
-- We are all customers and dont have access to any o2 accounts