I have called and called but no one picks up. The ...

I have called and called but no one picks up. The phone rings but then the call is DROPPED!! Why have a phone number and no one picks up??!! I just have one simply question regarding the copy I sent of my Medicare Card. I am retired and will be 65 in December. Just want to be sure that am covered for medical issues that might arise once i return 65. Please Help Us Office of Labor Relations!!!