Thank you. I did try most of that including deleting and reinstall the app to no avail. Ended up just deleting the App all together. It may be that I have an old Huawei running Android 4.2.1. I don't know but it used to work just fine until their last update about 2-3 months ago. At the time I tried to book the flight online (Feb. 2, 2016) it was ~ P14,000 for 2 adults from Duma to Manila with 15kg luggage and no reserved seats, no insurance. When I went to Cebu Pacific office next to C&L Suites on Rizal across from Shell Station they charged us 16,115 piso for exact same flight and details.
I have the same problem with 2go trying.g to book a ship from dumaguete to Manila. I can't use my credit card or bdo on there. It says it denies cause of fraudulent. But the card works everywhere else in the Philippines. If I go to a 2go agent they want to charge me 200php per person to book the same deal. 200php per person isn't about for me but for a local. That's just wrong. They lost a 5,200 booking for greediness. I am no saint. They lost 5,200 booking caused I am also cheap but if they pull crop like that online. I could imagine somewhere down the line they will pull it again.