How can you beat Leona as Nami ?

I don't feel like {{champion:89}} need's a ban , because I usually ban {{champion:8}} or {{champion:63}} or {{champion:25}} . So i was wondering if any of you true {{champion:267}} mains or support mains in general can give me some advice on this matchup because i've been struggling because i can't peel her off my ADC like you can with other supports . Can Nami's bubble interrupt leona's E like Janna's tornado can ? Thanks!
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