error connecting to minecraft services in launcher (demo game)

Sorry for any error in english (I'm using google translator).
I've been having problems trying to play the java version of minecraft since I bought the game (I bought it by rescue code), just sometimes when I open the launcher it says I didn't buy the game and the demo version of the game appears, " oh no! Something went wrong, and we couln't connect to Minecraft services"... As I said this error happened since the beginning, but it was easy to solve, I just closed the launcher and when I opened it normally it went back to normal, but now not even restarting the launcher or logging out and logging in can I play the game! The problem persists all day, the problem was already annoying, and now I just can't play because of it
Thanks for taking the time, but this should be resolved quickly! A game company as big as this shouldn't have such serious bugs in their launcher!