Advice needed on rent to own

[Tyler Davis]

My sister is currently in a rent to own house, she’s been in it for two years and it runs until 2024. The landlord is starting to cause issues.

My sister contacted her today asking how much was left on the contract and the landlord told her the contract is broken and they were reverted to the old lease of 2 years ago. I read over the lease and the only way out of the contract is the following statement 

“If Buyer falls 60 days behind on monthly payments, Seller reserves the right to terminate the contract and owes Buyer no damages or down payment. Upon terminating the contract, Seller would have 30 days to vacate the property.”

They have never been 60 days behind, the landlord is saying she served and eviction notice back in September via mail. But they never received anything. Also she never gave them a termination of contract either saying the contract was broken. The entire situation seems very shady, they have all of the text messages and proof of rent payments.

What is the best way to move forward with this?