@MissingCallsHave you checked on your phone that you have not blocked unknown numbers from your handset? Also are these calls coming from a specific number range etc?
You can contact o2 by calling 202 from your handset or if available live chat @
https://www.o2.co.uk/contactus ( A pop-up will appear on screen if and when an agent is available).
Is this a business contract or a personal contract?
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iPhone 16 Pro Max - o2 and Spusu
Xperia 1V - Spusu
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This is not customer services and we dont have access to your account
I do not work for o2 or any VMo2 /Telefonica/Liberty Global Company