Not able to to sort out my Greebbacks problem

I have been trying to get my points back from Greenbacks but are getting nowhere. The person assigned to my case does not seem to think it is important and keep telling me he has queried it with them. I need someone from Greenbacks who has some authority to contact me as the people in the call centre do not really snap the situation and I have spent enough money trying to explain it to them. I have sent a mail to the person handling this case that I will have to go back to Hello Peter if I got no response from him. I did not and thus I am back on Hello Peter. My previous case number was Case : ********** : Nicolas