My question involves a traffic citation from the state of: California
This is in a business location. There is an issue involving one of the tenants who parks his and his customer's vehicles in other tenant's assigned parking spots. Every time I get to the office, he has a car parked there and I have to go ask him to move it. One day he parked a car overnight in which I have had enough of him taking advantage and called the assigned towing company that is on the sign in front of the parking spot saying "Subject to Tow at Owner's Expense. Police Dept. Phone Number -- ABC Towing (Not real)" He told me he is won't come to tow the vehicle and said he will come the next day to talk to the tenant (He has done this a few times).
My question is: Am I allowed to use a different towing company to tow a vehicle out of my assigned parking spot (At owners expense)? For example, use XYZ Towing even though ABC Towing is assigned.
To confirm, these are spots that are assigned to me. This tenant I am having an issue with has been a real pain to deal with.
Thanks in advance.

