What a disappointment

When I first moved into the apartment I was renting, there were all sorts of problems and the estate agent who was supposed to assist me went dead silent. Someone else from the company eventually assisted me and all was well, until I moved out. I moved out 1 December 2019, we did the inspection and all was in order. I followed up twice on my deposits (my emails were only responded to when I followed them up with calls) and the only feedback I've received is that they are waiting on the owner. I signed a contract with Nextgen, who are very quick to ensure that I uphold my end but when it comes to the owner, that doesn't seem to be the case. More than 1 month later I am still waiting for my utility and rental deposits. No updates or feedback. This is the 5th estate agency I've had to deal with in my life and by far the worst. I've never had such problems before.