Terrible service - breach of contract

We've booked and paid for accommodation on 17 Jan 2019 for the period 16 March - 23 March. We received confirmation from LekkeSlaap that payment was successful and booking was secured. We never heard anything from the unit owner or anyone for that matter and was concerned about a few things - 2 weeks later and still nothing from the agent or owner. We communicated our concerns with LekkeSlaap on numerous occasions who just blew us off. I was given another contact number for the owner or agent who eventually picked up her phone today, just to let us know the we wont be able to stay at the accommodation booked through LekkeSlaap as the owner will occupy the unit at the time. How is this even possible? How can you allow the owner to just cancel my booking without any notification? I hope you guys can LekkeSlaap tonight knowing that you stole my money and ruined my son's first beach holiday!