Rental agents

I rented a flat through them. The inspection was done before moving in and all issues was raised and noted and none was fixed. On the day of moving out the inspection was done again and one issue was not stipulated in the initial inspection witch we have informed them about. 3 days later new tenants moved into this flat and luckely on that day I had to take the spare keys back to the flat and met the tenants. They conected up the washing machine and flooded the kitchen. The owner of the flats family member came to the flat sticking her nose in our business then ran to the owner telling him the whole kitchen cupboards need to be replaced. This was very un professional of the rental agents as they belived her story and the more I fought saying it was not us damaging the kitchen cupboards the more they insisted that I have to pay for the damage. Please people make sure when you do your inspections when renting from agents as they can cause big headaches for you.