Confirming that you have my funds but cancelling my booking because of no proof of payment

We travelled from Limpopo to Colesberg, My Inlaws booked a place through lekkeslaap and made it an immediate payment to the account number provided but did not send a proof of payment, After being in the car with my 7month old baby for 11 hours and phoning to confirm the address of the the place we booked i heard that we do not have a booking. I was contacted by Lekkeslaap who informed me that they received my funds but no proof of payment so my booking was cancelled. How on earth can you confirm that you have my funds but still continue to cancel my booking as there is no proof of payment. Your service is ridiculous.