People really need to learn to avoid buying stuff and doing transactions with their phones/apps, unless it is a life or death situation e.g. you are lost somewhere and you have no cash.
When it comes to buying durians, it's so much better an experience to buy in person, seeing the durian seller open them for you. Or you carry the durians home and open them yourself. Feeling the thorny skin and smelling the durians on site.
Sinkieland is rife with scams, because daft Sinkies are too trusting, conditioned since young to fully trust the govt, the 'authority', or the so-called 'science', without thinking two steps ahead. It's a happy hunting ground for scammers.