1992 Mazda MPV 4WD WON'T ENGAGE? HELP.

I HAVE A 1992 MAZDA MPV 4WD, MY STARTER WENT OUT, AND WHEN I GOT THE STARTER REPLACED THE MECHANIC REPLACED MY LEFT FRONT AXLE BECAUSE THE BOOT WAS RIPPED.
I WENT TO PICK OT UP PAID MY $679.00 AND THE CAR WOULD NO LONGER SHIFT INTO 4WD, I TOLD HIM ABOUT THE PROBLEM HE RAISED IT UP TINKERED ALITTLE MORE AND SAID HE DID'NT KNOW WHY IT DOE'SNT WORK, "AND IF IT DOES NOT START WORKING IN A WEEK OR SO BRING IT BACK, AND HE WILL TRY TO FIX IT." I WAS UPSET BECAUSE SNOW IS COMING, AND I CHECKED THE FUSE IT'S NOT BLOWN? HELP PLEASSE. :Cry: :x :cry: [/b]