If the grantee, its successors or assigns willfully violate or fail to comply with any of the provisions of such grant, fail to make timely payment of the franchise fee, annual charge or charge for additional actual costs and expenses incurred by the city over and above the annual charge, or through willful or unreasonable neglect fail to heed or comply with any notice given the grantee under the provisions of such grant, then the said grantee, its successors or assigns shall forfeit all rights conferred thereunder and such franchise may be revoked or annulled by the city council. (Ord. 5532 § 2, 2004.)