Man! $MART's been ticking me off recently, with delayed SMS, sudden "Check operator services" errors (which means I can't send SMS at all) and problems regarding their 258 Promo.
One of my friends already switched to Globe Handyphone to avoid these mishaps.
Please get this fixed soon, if you want to keep your subscribers and your cash flowing like a river.
I know you have the capacity to do this, $MART.