Roaming package reminders

Why do I keep getting reminders to buy a roaming package when I've already bought one?

These reminders are automated CharlieB. How frequently are they coming through?

I can't remember exactly but there were at least two on the day I bought the top-up then a couple more the day after, then they stopped.

OK thanks for the detail CharlieB. I'll check with the roaming team what the usual frequency of these messages should be and how to stop them.