It's been 7 weeks since I checked out and I don't ...

It's been 7 weeks since I checked out and I don't have my US 500 deposit back yet, despite them saying it was approved within three days of check out. Additionally, I was told by reception that it was only an imprint taken, and yet the money was taken out, which made juggling money a bit tricky. I have tried numerous time to contact them with no reply. I am about to take legal action. Try a hotel that won't rob you....