Accepted in MSc program but not invited for a visit?
I was accepted into multiple MS programs in math. None of them invited me for a reimbursed visit. When I applied for a PhD, every program gave me an all expenses paid tour. It has been my experience that if you are an MS student, you are not going to be cared for much. If you are a PhD student you will get much more in terms of "acceptance perks." 

That being said, they should at least be willing to guide you to the proper resources for learning more about their school. If it was me, I would not accept the offer from your first choice. They do not sound easy to work with. 

I would reach out to a few people that you want to work with at your first choice school. If they also blow you off, that would be a bad sign. A really bad sign. A degree from a middle of the ranking program is worth more than five blown years on trying to get an MS at a high rank institution and banging your head on the wall. My experience is that it is much better to go to a school where they care about you and you will be happy than to go to a school where they do not even know you and are totally unwilling to help you.