Still waiting for ThankU points

I was due to receive ThankU points in December of last year for not claiming against my motor and household policy. In November I received a phone call telling me that they require my ThankU number in order to allocate my points. I provided the agent with my number. Two weeks later another agent phoned with the same query. I again provided the number. On the 17th of December I received an e-mail stating that they cannot allocate my points because they do not have my ThankU number. I responded to the mail and again provided my number. I queried in January , February and in March and still no joy. In early March I eventually spoke to Joseph who I was told was the Manager. He took down my details and said he would get back to me. I did not hear anything. I again phoned the call centre on the 29 March and was put through to Joseph again. He told me that he was not at his desk but he took down my details and said he would get back to me. On the 31th of March I phoned him again because I had not received any feedback. I was the told that they do not have my ThankU number and that I should e-mail it to *** matter has still not been resolved and I have still not received any feedback.