I filed for SS at a local office when turned 65, but was denied as the clerk was unaware that my 20+ years of work in Canada can be added to my 6 US credits. I filed an appeal online, but was ignored even though I got a confirmation that it was received. Then I sent another appeal with all the paperwork to a PO Box in Maryland. Once again, no reply. It has been 3 years since I was supposed to get my SS. How can I get them to reply and process my payments? The phone contact is beyond dysfunctional.