Disaster!

Done a booking and paid in full before arrival. My first mistake.... I shouldn't have. Arrived after a 5hour drive, at a dirty self catering appartment. Bedding does not fit on the sleeper coach, shower is blocked and all the dirty drain water is flowing back into the shower, entire bathroom under drain water. No plugs for bedlamps, coffee machine is not working as advertised, no space for 4 people as advertised..... According to Lekkeslaap they will enquire if the owner will refund me.... But, I have done my booking with Lekkeslaap and paid all funds to Lekkeslaap....?? Surely Lekkeslaap is responsible for this mess???!!!