Guardian Asset Management owes me money following ...

Guardian Asset Management owes me money following the closing of my house one month ago. I bought a HUD home that was managed by them and gave a check in the case that I spent utility money, but this was due back to me at my closing. No one will call me back or answer the phone. It has been a month and no resolution. They also winterized the HUD home I purchased before my closing and there were several leaks from burst pipes. Do NOT work with this company! Please! Save yourself the money.