Section 64. Any consumer reporting agency, person who furnishes information to any consumer reporting agency, or user of information which is negligent in failing to comply with any requirement imposed under sections 50 to 62A, inclusive, with respect to any consumer shall be liable to that consumer in an amount equal to the sum of any actual damages sustained by the consumer as a result of the failure and together with, in the case of any successful action to enforce any liability under this section, the costs of the action and reasonable attorney's fees as determined by the court. The remedies provided hereunder shall not be exclusive.