Can a lease contract be broken if forced to sign under statements not in original lease and/or circumstance arise after the fact?

My apartment contract is about to end and it states that I have 30 notice to give of my intent to vacate. However, three months before my end of contract, I was contacted through several letters by my apartment complex stating that I had to give a 60 day notice or I would not be able to renew my lease. Unaware at the time that my current lease states I have 30 days to give notice, I signed the lease unsure if I could find a place to stay. After "renewing" the lease, my car was illegally towed from the property, in addition to several undesired occurrence in the residence. I gave written notice and verbal notice that I would be vacating at the end of my current lease, 50 days before the end of my lease. Now my apartment is stating that I cannot be released from the lease unless I pay two months rent and relinquish my security deposit.