Buying a new goodybag

[#1]

My data ran out in my goodybag. I want to upgrade from the £15 bag to the £25 always on bag. I've selected the £25 bag but every time I try to buy it I get a page saying 'why not upgrade to a bigger bag' but only giving me that option of selecting the £20 bag. How do I get around this?

[#2]

' @iansunbear if low on data try this way start new goody bag now https://community.giffgaff.com/t5/Announcements/Introducing-Early-Re-purchase-on-Goodybags-and-Gigab... this can only be used if current goody bag has less than 100 calling mins or 100 mega bytes data also if you use recurring goody bags switch off here first please http://giffgaff.com/profile/payment-details  hopefully that helps out