Unprofessional

The worst service ever. I made a booking, they send me an invoice. I pay it immediately and emailed them the proof of payment. A few minutes later they send me the same invoice with a different amount. Two days later I receive a booking confirmation with a statement indicating again a different amount as well as that they received my payment but again a different amount. A week before the booking date they send me a reminder that the full booking amount is outstanding. What a mess!!! Be carefull and avoid using them at all.