While away in Norway recently it seemed I was running out of my usual 10Gb allowance (normally adequate for the month in the UK) so I bought a 20Gb add-on. It's set to expire the day before main monthly contract renews and as it happens I've not needed any of it and will lose it all. How about at the very least letting it run until month after it was bought; better yet don't have it expire and let me have it as a 'just in case' back up.