It depends on why you were towed.

How long had your car been parked in the lot? Was it apparently inoperable or abandoned? Was it parked in a handicapped space or a fire lane?

If you were towed pursuant to VC 22658 then you may have an argument to receive a few dollars back from either the property owner/manager, or the tow company (depending on the circumstances).

First thing, get your car OUT of impound. Every day it will cost you more. Second, make sure to get any paperwork that you can on the impound. If they will tell you, find out who authorized the tow. The tow company is generally NOT permitted to drive through parking lots and tow cars, so someone will have to have authorized the tow unless you were parked in a fire lane or were towed for some reason not specifically covered under 22658.