Hi officialbry! Apologies for the experience. For postpaid users who avail the charge-to-bill service, yes, there's a P500 limit per month. However, if you want to avail of further transactions beyond the charge-to-bill cap, you can cash-in to your GCash account and continue availing premium services for Clash of Clans.
For unsettled or unbilled items in the AppStore, kindly contact iTunes support or the app developer. We unfortunately do not have any control or visibility on their systems.