Poor Customer Service

I request to have one of my policies to be cancelled and be paid up on 7 March, I was then advised that turn around time of 15 working days. I made another call on 28 March and was advised my request will then be actioned by 31 March. The agent who assisted me,Tanya Aaron promised me feedback and a call back but none was received. I made yet another call to old mutual and I spoke to Tanya again and she still promised yet another callback and still none was received. My request has still not being been actioned and no feedback has been received. I have not received any joy from old mutual.