Is there the way to resolve RAM problems?
Did you buy the RAM from a provider that guarantees it for Macintosh systems? I've gotten RAM from a big box store that has met the exact specifications, but wouldn't work in my Mac Book Pro without crashing all of the time. I ended up returning that RAM and getting it for about the same price from a vendor that guarantees it will work in my specific system.

Apple specs say that this machine is capable of a maximum of 8GB of ram, but third parties have found, that with the right modules, 16GB works fine.

I'd recommend returning your current RAM modules and getting new ones from a Mac specialist. I don't think that the modules you have will ever work with your hardware.