I've been struggling with this fridge for almost a month now.. someone please help!

At first it was not freezing anything in freezer, so I called in a tech and "fixed"it for a lot of money.. he changed capacitor , cleaned under fridge and that was that.. started working again.. for about a week , then it started happening again he says it's the defrost timer and it will cost a few hundred.. no way I said .. changed it myself.. took a bit to start working , when it eventually did , a week later it starts doing it again.. it was dead no noise nothing , I reset timer and for a few days it seemed ok.. last night before going to bed I checked it out and the freezer was really freezing everything , I could see ice on some veggies and a bit of frost on the back wall.. I also noticed fridge was warmer than usual.. it was late so I left it at that.. this morning it was completely dead, no noise nothing .. I opened the freezer all the frost was melted away .. everything in the freezer was soft to the touch.. I took everything out , checked to see if compressed was working . Nothing! Everything was dead.. I could hear the water draining.. I unplugged it .. took back panel in freezer off and there was no ice , nothing .. looked brand new .. I wanted to see if fan was working so plugged it in and nothing, so I turn the defrost timer and it goes right on.. the fan was working and cold air started to blow.. so I unplugged it . Put everything back together.. plugged back in and it starts.. it's been an hour or more and I don't want to open it just in case , I can hear it running.. I checked and compressor is running and the fan beside compressor is on .. so what is going on!?? Why is it malfunctioning so often?? Why is it either frozen - semi frozen- frosted, warm fridge ?? It's all over the place .. it works it doesn't? Can someone please help??!!!

Yes it's that one
There are diff ones?

Its worth a try.

There are many different timers for each brand. Some with longer or shorter defrost cycles. And longer or shorter refrigerate times. Also some are wired differently internally. Your model number is missing two digits.

Found a very worn out label at the side and I can make out W1 at the end

Your defrost timer is an 8 hour/30 min. timer. So every 8 hours it will go into defrost and the 30 minutes later it will go back to refrigeration.

So if you should open the freezer door during that 30 minutes you might see the coil glow or hear the water dripping on the hot defrost coil. Both normal during defrost.