Hi @Anonymous, welcome to the community!
Unlimited minuites and SMS only applies to UK mobiles and landlines (beginning 01, 02, 03 & 07) and specifically excludes MMS and calls to service numbers, premium services etc.
Have you checked your usage via MyO2 either on the O2 website or via the app to see what you have been charged for?
It is worth pointing out that we aren't O2 Customer Services, we're just customers like you therefore if there is a billing issue with your account you would need to speak to the team either by calling or using live chat. That said, we will certainly do our best to help if it's simply down to charges for calls which you thought would be included in your Unlimited package.
I work for O2, however any advice or opinion given in this community should be considered my own and not necessarily representative of Telefónica UK Limited.
