Using uber is very helpful until you book a trip with your credit/debit card.in my country drivers refuse prepayment trips. So they cancel when they got to know that it is a prepayment trip.After they cancel it takes ages to get the refund.and when you inquire it from the customer service they are asking for tons of documents,even after you provide those to them they won't response to you. If a customer can't have the assistance easily why there is help center.i need my refund asap.