30-12-2023 03:57 PM
30-12-2023 04:37 PM - edited 30-12-2023 05:03 PM
Unfortunately you can't.
Membership plans always run their full monthly course and a new one can't be started early.
The only option here is to buy a data add-on or get some data via the Flexi Data options:
Depending on what plan you're on the Spot Me option might be available to you allowing you to "borrow" 1GB from your next membership: