Hi @Richard Lynas, welcome to our forum! I'm not too familiar with this error. Which bundle are you trying to buy and where?
Could you share a screenshot of this? (without private information on it)

@Richard Lynas I havent heard from you. Have you managed to order the new bundle in the meantime?

Hi Thomas - thanks for this. I missed your reply and gave up trying to sort it because I couldn't get to the bottom of it. I switched to a different operator for data but if this issue can be resolved I would buy the 5GN bundle and switch back again to using data with KPN. I have tried periodically but still get the same error. I will keep an eye on this forum in case you reply. Many thanks

No worries, if you'd like to try again you know where to find us.

I'm not sure what error you're getting at which steps. Could you elaborate on that?
If the number's still active with us I could take a look at your data.
Could you update your profile with your phone number and simcardnumber and let me know?

You can also always give us a call on our free number 0800-0402