How can I fix my Hotpoint Fridge/Freezer RFA 70 ?

Hello can anyone tell me what I need to do or do i replace my Hotpoint RFA 70. The Fridge/Freezer is cold on the inside but around the outside middle is very warm for over a week, I defrosted it this morning but seems worse. The light indicating Freezer high temp is red for 2 hours now and it is even warmer/hotter on the outside than during the week now. It has been making a louder than usual noise all week. What should I do?