First Help Towing - the **** you into towing with them

First Help Towing - tows under false pretense, My son was in an accident and I had organized my own towing service. On my way to the accident scene I received a call from First Help Towing wanting to tow the vehicle. I told them to leave it as I have already organized a towing company. They however said they will do it cheaper and they will not charge storage, On that condition I agreed and cancelled the other towing service. However they now don't take my calls, they transfer me from one person to the next and the driver that towed the car also does not answers his calls anymore.