I can't get someone to be honest with me from MetLife.

My employer has STD and LTD via MetLife. I have been approved for LTD benefits. I received one payment but then they stopped. I called to find out why I did not receive the next month’s benefit payment and was told my account was placed on hold. Agent stated that I should have received a letter stating why. I did not receive a letter. Since Social Security paid me, MetLife has over paid me. Okay I can understand that. Here is where the fun begins... "How much was I overpaid?" "I cannot calculate that right now, but you can do the math." "Can I speak with your supervisor?" "I am the supervisor." Now, it has been 6 business days and have not heard from or received a letter from MetLife. I could tell you several additional horror stories but the all seem to be covered already. I am currently researching how I can get help with my problem. Right now for me the biggest problem is not being contacted. Yes I need the LTD payment but I cannot even get someone to be honest with me from MetLife.