Unacceptable Service and Client Neglect

My client had some unforeseen financial issues and due to this the the clients premium was unpaid. I called Hollard to find out what the client options are in order to keep the policy active. The gave me certain instructions we needed to follow. We followed these instructions by the letter but never got any communication form Hollard. I called to follow up on this and was told that the policy were cancelled. The person I spoke to told me that there is no person with the name I spoke to previously. I was told that it is not Hollard problem that incorrect information was supp**** to me by Hollard from the person that no longer exist and that there is nothing we can do to reinstate the policy. I was very upset and told het that this type of service in unacceptable and that I want to speak to a manager. She promised that a manger will call me before end of business yesterday but no one ever called. I know that I can contact them again but it will make no difference because they always say that they will get a manager to call or that a email need to be sent but this is just said to get you off their back. No one ever respond to the mail and no manager ever call.