Good morning I need to change the social security card, because I got the work permit and I understand that it is another card, can I make an appointment by phone ???? Thank you

They don't make appointments to get a new card ... you have to go in person and wait.

My husband passed away. I have to take a turn or go personally

I have sent my working life in Spain by mail so that they can answer me if I apply to complete my 10 rooms for retirement and medicare with what I worked here and they have returned the documents without a response. What box, department or address should I go to. They are attending personally, do I have to make an appointment?