Rental agreement

Hi. We've rented a unit in a complex for about 3 years. The entry inspection was done. 22 days after moving in, we sent photos of all the little things we had picked up that were wrong. We requested the shower door be replaced and they replaced it 6 months later. We requested the window frames be replaced as the wood was old and falling apart - at some stage the window fell out and it took them 2 months to replace it. So needless to say, their process and service wasn't great but our rent was relatively cheap so we stuck it out.Since then we have moved out. An exit inspection was done, they sent is a list of defects they would be claiming for. We again sent them the photos to which they stated because this wasn't done within 3 days of moving in, we don't have a leg to stand on. After much debate, they changed their minds about what to claim for.A few days later we recieved communication again stating that the owner has done his own inspection and will be claiming R7000 odd rand to replace cupboard doors in the main bedroom. The damage was existing but it was minor and we didn't notice it at first so it wasn't noted on the entry inspection or on the exit inspection by Monarch, the rental agent.They are now taking this from our deposit and would like to know if they are allowed to do this?

Thank you in advance