Don't book, they are a scam
Booked RedBus for my return trip to Singapore from Kuala Lumpur, and from Singapore back to Kuala Lumpur after. Bus was cancelled from KL to Singapore with no reminder or information given, card was charged for the trip. Tried to cancel the return trip from Singapore to KL since I wasn't in Singapore, failed because they said no cancellation of return trip. Wrote in, called in, nobody responded and there was no refund for the non-existent trip. It was a complete scam. Ridiculous.