Bad customer service from Landstar properties

I rented a unit with Landstar properties for 7 months and I moved out on the 30th of November 2023. I asked them how long it would take to recieve my deposit back and they said 21 working days maximum. When it got to 21 days and I still didn't recieve my deposit, I contacted them daily and they did not answer my calls or whatsapp messages. Eventually I got hold of the lady on the 23rd day and she told me that they are on leave and they can't do anything until the 3rd of January 2024. I asked her why they did not process the payment before she went on leave, and that it is just very unfair and unprofessional that I should wait that long for my deposit and she responded that I am wrong for bothering her during her leave and I should have followed up before they went on leave (as if I should have known when they go on leave). Landstar properties lacks professionalism and good customer services, I highly do not recommend them.