Hello,
If you sent the nokia model to be repaired, odds are that you have lost it all, normally you can use tools to recover info of the card and phone tools for example pc file recovery and recovermy files. but as I found last year, if nokia recieve a damaged phone, they hook it up to a diagnostic machine, if it fails the test they remove the insides and replace them with new ones.
To see if this is the case, type *#0000# a set of numbers appear, look for the set in date format, is it similar to the date you purchased the phone give or take a couple of months?