Leased condo has been sold, what are renters rights to terminate lease

I am currently leasing a condo that was also for sale.  I had a 1 year lease. The condo was sold before the lease expired.  The rental company says that I must continue to stay for 60 days from the date the condo was sold.

I want to leave earlier than that period but also have a 1 month security deposit as well as a "pet deposit" for my dog.

There is nothing in writing in my lease agreement that addresses this situation.

To complicate matters, I was informed the building was well maintained and had 24 hour security.  The security portion in reality is not true as there are no security guards on Sundays and occasionally the security company does not provide a guard for a night that is other than Sunday.  In addition, I have noticed several issues, including the maintenance person on duty during Monday-Saturday who has keys to my unit and entered my unit to cook dinner and drink all of my alcohol while I was traveling back to the United States.  I confronted him and he admitted to these facts but said, "I was going to replace what I took before you returned."  I returned to my leased condo earlier than he anticipated.

I live in a very nice area in Guanacaste and my property here is considered a prime rental location.

Do I have any options to get out of the requested "60 day intermediate period?"

All suggestions and comments are welcomed.  I apologize if this issue has been addressed in the past.

Jay