Was that a newer 30 day bundle, or one of the previous bundles still, that they used to give 60 days on ?I just extended my bundle without any airtime. So I guess this was a way for them to what? Find a compromise whilst still offering value?
If 60, then you're very lucky to have been given the option to extend.
If 30 days, then I recall reading (further up the thread) that they give 1 free extension, then after that, you have to keep loading airtime to be given the option to extend.