As per the subject line.

I have a carryover combo that was last renewed on 28th of February. As it hadn't renewed today, I thought I'd hurry it along by stopping and restarting it, figuring that it would just move the date back 1 day (the 28th was only for Feb, the normal renew date was the 29th). Unfortunately, trying to renew it now displays an error that I already have it (it expires today) and that I can only have 1 in any calendar month (was last calendar month when it renewed).

I had previously browsed the terms and conditions and saw that if a carry over wasn't renewed that you had 14 days or so to buy one before you lost your carry over minutes - however, now that I've done this and couldn't renew it, I see that the terms are if it couldn't renew due to lack of credit. I'm thinking that the minutes that I have carried over will disappear tonight as I can't re-buy the pack, and, they won't be there tomorrow when I do buy the pack as the lack of a carry over wasn't due to insufficient credit.

So - is there some text message to toggle the auto renew flag of the carry over combo, or, have I just shot myself in the foot?