I am an independent operator who is currently dealing with large charges from the company I contract with can I sue due to non payment ?

Company has an ill defined shrink policy. After speaking with those in managment all are unable to determine how I received the charges and continue to charge me without a proper explanation. As a result of the overwhelming charges I am not able to run the route I have bought due to non payment or a shortage in my checks. I have tried to go over the charges but the number simply don't add up and the company refuses to offer any other explaination other than that it is right. Even when confronted with the numbers and abnormallites in my cases they continue to try to dismiss it and blame me.