Direct express debit card Stole my money

I had unauthorised charges on my card for 2 month's totaling  over $440.00 .I filled my reports and while waiting for a written conformation, I would have the company put the money back in then take it off the next day.this has gone on for three months , plus I called to let them know I received a written letter ( stating they had opened a investigation regarding the fake charges of $208.00) even considering that's half owed me..they then took a additional 208.00$ out of my check.  Now I'm at - $40.00 at Christmas no presents here! Because its a government card , how can  I get back my $628.00 !!!