I booked a short one hour flight from Lombok to Bali through Opodo recently. An option on their website was to pre purchase excess baggage. I paid $130 to increase Citilink Air allowance to 50 kg. When I arrived at Lombok airport for check-in Citilink had not received the $130 from Opodo, I therefore had to pay the $130 again, in cash at the check-in. I emailed Opodo 2 weeks ago regarding this and have received no response.