breach of contract

They shortened my 30 loan repayment each month to 25 days and when i went to make a payment they told me i was late by 1 day and that they sold my items. This is how they manipulted and stole from all their clients because many things in their stores are there because they alter the contracts at their own will. Its not worth my effort to sue them. They STOLE my items right under my nose!!!!