Lissabon has nowadays a touristic boom, which leeds unfortunately to a situation that Rbnb-s are overprised. This corcerns also André‘s tiny flat and its cheap interior / furnituring (I do not want to go into details... would be a novel) - compared to its prize. So, I cannot really suggest the place, unless you do not have any better options. : )
The best you can do is trying to avoid visiting this city in the next years so that prises will get realistic again. : )
Secondly, no answer on any massage or question from the guests means simply bad communication and a kind of careless mentality - which should not become a standard by Rbnb hosts.