BUG with frozen screen making me a leaver and then taking lp from me

hey so i was about to play a ranked game and when it went to the lodaing screen the game froze, so i waited like five to ten minutes for it to load but it did not so i task managered it away thinking i would just push the reconnect button but when i closed it the game had been remade and i was given a leaver penalty of 15 lp lost because the game thought i was a leaver. is there any way to get this lp back because im not great at the game and i dont like being at the point where a loss means demotion (too much nerves)