Kicked from game, and couldn't reconnect, no LP, and got low priority Q

In the middle of the game, about 12min, it just disconnected me although my internet was fine. There was no option to reconnect and my friend invited me in a new game. I was searching for the game I was playing, but there was no such game in my game history. I wanted to check again before entering a new one cause we were winning hard and it was ranked. I exited league client few times, suddenly it reconnected me in 21st min of the game. Players were still inviting me to parties and couldn't see I was already in game. We won that game anyway, I had 5-2-7 kda, but I got low priority queue, 20min for 5 games. What's even worse, I didn't get the LP from the game I played. At the beginning of the season in my promos, 2 wins were deleted, and I can see them in opgg. I want my LP cause I'm struggling riot!!!!!