Breach of Contract
I just signed a rental lease for a new apartment and I just found out that the tenant is overcharging us. I heard there was a 72hour time period that would allow me to get out of the contract if he doesn’t agree to lower the price. I want to know if this is true or if there is any other way I can get out of the lease because of the new information I just discovered.

rental lease
If a one year rental lease is up on a specific day, do the tenants legally have to give a 30 day notice they are leaving?

Breaking lease – statute of limitations on claims by landlord
We signed a six-month residential lease in January of ’97 and left a few months later (but before the lease was up). Neither we, nor the management company took any action at that point. Last month, we received a letter requesting nearly $2000 – most of which was for the balance of the lease, and some of which represents repairs they claim they had to make (none of which they notified us of until this last month). There is no provision in the contract addressing any penalties or obligations on breaking the lease.
My questions are as follows:
1 – Isn’t there a statute of limitations that would prevent them from coming after us now, after nearly four years?
2 – Even if they can’t sue us for the money, can they legally place a negative comment on our credit records? If so, what do we need to do to prevent this?
3 – Because this was so long ago, we don’t know (nor will they tell us) how quickly the management company was able to re-lease the apartment after we left. But it’s my understanding that if they did re-lease the apartment, we cannot be liable for rent past that point.
Thank you for any help you can give.