Non existing service at Metropolitan

My husband changed banks and we tried to change the banking details of his policies he has with Metropolitan several times. We sent all required documents to the support staff at Parow centre, to their Regional Manager, to the Regional manager's assistant and to Metropolitan's customer services as well. In total we sent 5 emails without any response or assistance. There after we sent in a complaint and they contacted my husband via telephone and he then told them he wants to cancel due to poor service, they never got back to him and did not advise him how to go amount doing cancellation. We did not want to cancel in the 1st place but due to poor service do not think it is worth it to stay with Metropolitan.