Fridge service?

So, today I finally pulled the fridge out to inspect and clean it, however nothing really noticeable on the back side nor is the drain obstructed or dirty. There is a bit of copper rust on the pipes, but seems mostly surface.

So back to the drawing board- can anyone recommend a decent service technician that won't take me to cleaners?

Ili po naški, zna netko kakvog frižider servisera koji me neće preveslati i nije preskup?

Thanks y'all!