Hello, I sold 4 items this week and 2 of them is unpaid ( I of them is just gone over the 4 days, and the other not very long to two days) not a very good success rate 😢 should I open a upi case, I don't want to get a negative feedback. The 4 day one said he would pay tommorrow, but I don't think so. they both have 100% feedback saying they pay quickly! which isn't true.