From this information it looks like I or anyone would lose 5mb -
How can I buy a goodybag early? Back to top
If you run out of minutes or data in your current goodybag, you can purchase a new goodybag early. There are different ways to buy a goodybag early, depending on the result you want to achieve:
You want your goodybag to be renewed automatically every month: you will need a recurring goodybag. You want to anticipate the purchase of your next goodybag so it starts when your current goodybag expires: you will need a queued goodybag. you don't have any data or minute left in your current goodybag and you want to buy a new one right now: you can buy a goodybag early.
The third option, starting a new goodybag early, is only available when you have less than 5 minutes or 5MB left in your current goodybag, and at any time up to 9.00 p.m. on the expiry date of the current goodybag.
To purchase a goodybag early:
Log in and go to My giffgaff If you have less than 5 minutes or 5MB left in your goodybag, a message will appear under "My goodybags" If you are recurring your goodybag, you can decide to recur your next goodybag right now, If you have a queued goodybag, you can decide to start your queued goodybag right now, If you have no recurring or queued goodybag, you can select a new goodybag to start right now. When you purchase a goodybag early, it erases your current goodybag and you will lose any remaining allowance, so we ask you to confirm you are really sure you want to start a new goodybag right now. When you select a new goodybag or recur your goodybag early, the payment for the new goodybag is taken at this point, and a payment confirmation page is displayed. Your new goodybag is active and is visible in My giffgaff.