MMR is low? How do i repair it?

Hello summoners! I have a played a lot of league this days and i ranked up from g4 to g1 50 lp in just 6 days. Now i have a problem : I win 17 lp and lose 18 because of my MMR which is low as hell! Is there anybody who is plat 2 - plat 1 and can play some matches w me to repair my mmr? Also, is there any other way to repair my mmr? I can't escape from this infinite cycle of wining 17-18 and losing 17-18 Please, help me guys! {{sticker:sg-soraka}}
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