I disputed fees charged to me by the city. I refused to pay without arbitration. Can that be considered criminal petty theft?

I took possession of an animal trap provided by the city of stockton. I signed a rental fee agreement mistaking it for nothing more than a confirmation and promise to return as designated.Upon returning the trap I'm asked to pay fees I was never made aware of. Had I been would not have entered into agreement. Could easily get service for free elsewhere. I refused to pay without some type of arbitration and was subsequently arrested on petty theft charges. These charges brought on me by a Sargeant.