Not upfront about their delivery fee.
Delivery charges are not clear that it would be per item and not per delivery. Ie, to post 1 item would cost SGD 5+, to post 4 of the same items at the same time to same address is SGD 20+. Each item is small and the total weight of the items is less than 1kg. I cannot understand how the SGD20+ can be justified, even if it is coming from Malaysia to Singapore. You have no choice but to pay for the delivery as the cost of the items are already prepaid.