Again, without any specific details, you will receive vague answers to your question. If what you are saying is true and 2 weeks after the foreclosure sale someone cane and threw out all of your personal belongings, you should speak to someone about this. In the state of Florida, just because a property is foreclosed on doesn't mean that the new owner "Bank or Investor" can immediately take possession. If the property is occupied, they must follow Florida law and evict the occupants. The same holds true for personal property. If a house is abandoned and full of furniture and personal items, the new owner must still follow Florida law and evict. It also depends on what you are considering personal property and what the value of the property is.
If you abandoned your home and were foreclosed on and missed the posting by the sheriffs office notifying you of a pending eviction and missed the final lockout date, then the new owner can remove your items and will place them in the driveway for a period of 24 hrs, giving you the opportunity to retrieve your belongings. After that, they can trash out your stuff.
If your house was abandoned
The sticky part here is that once the court issues the title 10 days after the auction sale, they also issue a writ of possession. The writ is given to the Sheriff and he will post it on the house. At this time, you have 24 hour to move out or you can be forcibly evicted.
If all was filed properly and you just ignored all of the filings, then, you have no grounds for complaint. Sorry.
I do fell fro you and you can certainly check with a local legal center to see if any laws were broken (I don't know Florida state law well enough to know) but my guess is no laws were broken you were trespassing on the property once it was sold. The best advice any of us can offer is check with a lawyer.