NMG Benefits - Phones are not being answered / queries not being responded to

I have been calling NMG for over a week now to get a very simple query resolved. You phone the following number *** it rings for a while then the IVR tells you that you cannot leave a message at this time. You call the number *** you call this number after 8:00 when the supposed call centres open and you get told by the IVR that the query cannot be dealt with and that you are to call back later. When you do get through to this number then you get the call centre options to chose you press 1 and all you get is the music and man talking, no one ever takes the call for me to speak to. You send a query to the website and you get complete radio silence no one gets back to you at all. You phone ***and you get told that this number is no longer operational. WHAT EXACTLY IS GOING ON!!!!!!!!!