It happened to me in other games. So annoying. Don't worry. It's okay. You're good and you will be able to climb back very quickly. Do not anger yourself over this!
That shit can get annoying, but there is nothing that could have been done. Just shrug it off and keep playing. If you belong in that elo and are a strong enough player, that elo should come back in a game or two. Unfortunate though. RIP