HAVE NO FROST FRIDGE FREEZER, FRIDGE IS NOT GETTING COLD?

HAVE BOSCH NO FROST FRIDGE FREEZER MODEL NO KGU3301GB/01
FREZZER AT BOTTOM IS WORKING FINE BUT THE FRIDGE IS ON BUT IS TOO WARM AND WANT GO COLD.
HAVE TOOK OFF BACK PANEL INSIDE FREEZER AND DEFROSTED WITH HAIRDRYER ETC
LET IT STAND 4 A GD FEW HOURS SWITCHED BACK ONAND EVERYTHING SEEMED OK SOUNDED LIKE FRIDGE HAD KICKED BACK IN AND WORHING
CHECKED A LITTLE WHILE LATTER BUT FRIDGE WAS WARM AGAIN!
LOOKED AT BACK OF FRIDGE AND THERES NO WATER GOING INTO DRIP TRAY AND THE PIPE ON THE LEFT HAND SIDE HAS ICED UP (WHITE ICE ESOECIALLY AT THE END THAT GOES INTO THE BACK OF THE FRIDGE FREEZER AND THE THIN COPPER WIRE UNDERNEATH FEELS WET AND LOOKS LIKES WATER MAY B LEAKING OUT.
PLEASE HELP!!!!!!!!!!!!!!!!!!!!
CHEERS