penalized for being AFK due to my horrible wifi the past two days.

HI.. yesterday i started a league of legends ranked game, and due to the rain, the wifi turned off. It rarely ever happens to me that i get disconnect, but somehow i did. Later on during the day my wifi came back on and I checked if i had lost the game i played, and it turned out that it was a victory. I dont understand why i lost my LP in ranked, even though I won and helped my team get fed and then diconnected after being the one who led them to victory.Later that day I had seen my wifi get better and so I started another game. About 15 min in, my wifi had gone bad again and I had disconnected. My team still won. But i was penalized 10 min in low priority queu for 5 games. I had then waited a whole day to play league til today and hoped my wifi got much better. And so I started a game, and then got disconnected in champ select. Now i have to wait 20 min for 5 games. I am just worried that if i get another afk game due to the weather that I will receive a permanent ban even though I NEVER EVER have AFK'ed a match intentionally. Thanks ;)