With rams it is really hard to say. They are very delicate, and they don't like change. They can be picky about food and other tankmates. It is very possible that the move and the ich, was just too much for these younger fish. Many hobbyist try to combat ich by raising the temperature, and Rams should be able to take a higher temperature for a short period of time, so I don't think it was that.
It is very frustrating when you are left with one sex and not the other. So I encourage you not to give up, give it a try again, and make sure you have the right tankmates and foods. Consider keeping them in a quaratine tank for a few weeks until they are used to you, your water, your foods etc. This may help them acclimate better.