You should improve your interface, specifically for tipping. I just experienced a case today because of your laggy app. I paid my order already via gcash, but for some reason the app lagged and I double clicked accidentally add tip while I was rating the driver. I would've let it go if it was a small amount, but it was not. I was going to use that to purchase food for my family on a diff address. I chatted with your CS agent but they werent of any help. You should add an option to cancel tips.
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