What should you do if you had to break a lease as you had to leave the country and now you are back and you got a letter from a collection agency stating you owe 7 months of rent?

Contact the person who is sending the collection agency after you. Tell them that you had to break the lease because you had to leave the country. See if they can work out a payment plan with you. I know that my husband and my lease says that if we move out before our lease is up we have to continue to pay rent until our contract is up or until the place is rented out. Which ever comes first. They did not tell us that when we moved in, I just read it in our contract. Good luck:)