Data Bundle Disappears

Hi,<br> <br> I have a data contract with Vodacom, Every month they allocate data to my contact and once used up, I use prepaid to buy more data bundles. Recently I discovered that at month end even if I have a prepaid bundle left, vodacom uses my recurring bundle first (even though it was allocated after the prepaid bundle), causing me to lose my prepaid bundle after the 30 days.<br> <br> I see this as very ********* from Vodacom <br> <br> Regards,<br> Eugene