Half Of My Life Is In A Dumpster In Front Of My House!

Came home to find most of my furniture from my apartment had been moved into a dumpster in front of my house. I have lived in this home for seven years with the owners living upstairs, they both passed away last year and their kids got the property. They decided to terminate the lease with us and gave us a date to vacate at the end of April. They hired a company to come and empty the house, so I come home to find a man in my apartment and my apartment entirely packed into trash bags and half empty. The man says he wasn't told there was anyone living here and his orders were to empty and clean the house. I'm so upset I cant even think straight, do I sue my landlord? the moving company for throwing away my personal items? I need advice please!