I never use heat for ich, but many swear by it. But whatever treatment you start, you stay the course on. The spots may be gone but the parasite isn't. Hang in til it's dead. Since I don't use the method, and haven't for oh, 30 years, I can't recall the time period for heat. Anyone?
I can see the cheek strip on 3 out of 4 of the Geos, so I will say dicrozoster. It's a great fish, but it will grow. And your Bolivian rams ARE Geos, technically, as they are Mikrogeophagus altispinosus.
So if the Ich clears and all survive, you will have a wee problem thanks to that seller. G. dicrozoster is a wonderful fish, and beyond the colours and behaviour, you'll come to appreciate their wise looking eyes. I can't imagine keeping this fish without really liking it. It's big enough that it can really become a pet. It's also in need of pristine water, a sandy substrate (like the Bolivians), warmth and space. It is a water change addict, and can use good solid filtration. They tend to like their water to move.
You'll never have to gravel vac again (in your brand new large tank they'll need....). I have 3 large tanks. All are because of Geophagus, even if I no longer keep any. When we were in Gabon catching Chromidotilapia, I loved watching those African eartheaters at work, partly because they reminded me of my old South American Geos. Watching eartheater behaviour got me back into Cichlids after a couple of years when I had very few. There is something about eartheating fish a lot of aquarists really like, and Geophagus dicrozoster is one of the best to keep.
Next summer, I hope to have those big tanks back at work with African eartheaters galore, and I hope these SA ones work out for you. It's a surprise acquisition, but a good one.