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maybe your data connection is on KB Browsing. the charges for that is 0.15/kb. since you said you consumed 9.7MB (9932.8kb) multiplied by 0.15 may result to 1489.92. Well, that is just one possible reason. much better if you would Contact Us for account checking.
qwertyuiopes Hi there! chibiakachan seems to be right with the calculation but verify it still with the hotline. In addition to what she said, it would be better to subscribe to GoSurf to avoid bill shock. The minimum 30-day subscription is only P99 and it already comes with 100MB (text GOSURF 99 to 8888 or dial *143# for more options). You will also be protected by the Anti-Bill Shock Guarantee.
KB browsing scheme has been discontinue, and those on KB charging has been shifted to TIME browsing scheme, except those on Old Plan with Freebie F allocation.
It may be a system error, Once your bill is generated call the hotline and file a Bill Dispute.