Good Morning,
I can't understand the MAXROAM Global (+44) FAQs:

Will my MAXROAM SIM expire?

Yes, your credit will expire 180 days after purchase.

Will my Credit Bundle expire?

No, your credit bundle will not expire once your SIM and account remains
active.

Will my SIM & account expire?

Yes, your SIM and account will expire 365 days after your last cash top-up.

What I've to do to keep the SIM and the credit active and alive? Which are
the top-up imports?

Regards