Getting more data

[What1]

I want to purchase more data but when I top up my account with money it doesn’t add anything

[madasaf1sh]

@What1 

You need to follow this to add the bolton for more data, Guide: My O2 - Bolt-ons 

Otherwise any change of plan on Bundles or Rolling Plan is from your next anniversary date, you can contact o2 to get them to start it earlier, but this will change your regular payment date. Guide: How to find help & contact O2