How to play the champion you like to play now?

I put primary mid secondary top for the last 5 game now. I had a fill game then promo games so it said I'm going to get one of the two. It gies me a 2 minute queue time, pretty fast. Then I get top 5 times in a row. I wish primary had more weight. I could wait 5 minutes or 10 to get mid, don't give me 2 minute queue time and give secondary every time. I just want to go mid once, how to go mid now? Pls help
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