extreme sd card 16 gig dont work

how can i resolve my issue with my 16 gig sd extreme card 

i try the chat but it is very long 

i try email  i did have an answer but i cant resend back the answer off the question they ask me 

my card was almost brand new i took some pictures off my trip 

and when i try to take lake tahoe in california an error was right on my camera i cant beleive i loosse everything on my card 

i dont go often to california 

i am canadian 

t. y,