Flight inconvenience

Me and my family was scheduled to fly to Doha on flight QR1368 that was cancelled hours after departure time.we had tours booked which we paid for in advance ,we then notified their service provider discover@qatar airways of the incident at the same time we found out via email.we where then placed in a hotel overnight and scheduled to fly out the next with Singapore which led us to more discomfort as the airline didn't confirm our booking my kids actually started crying because of inconvenience as we where not ticketed to fly.the tours company then said that they will not refund us but the delay in flight was not our problem or fault.qatar airways really inconvenienced my family badly and caused us a miserable holiday as it started off badly.Our experience is devastating let alone traumatic.we need urgent answers regarding our money and inconvenience caused.