Arrogant and Undermined by the dealer principal

If I have an option to rate this business and their Principal dealership to zero. I will without any doubt. We have a signed contract with the "so called" marketing manager of which both parties agreed to some of the context in the contract. Mc Carthy bridged the contract and automatically we were unable to meet the agreement due to lack of funds as they promised. When we approached them. The dealer principal because immediately defiant and defensive irrespective. Until today we still trying to get what we were promised verbally and on contract. This is very unprofessional of them and now we don't know what to do