Blackberry hub subscription charges

Hi... A couple of months ago I downloaded hub and paid the subscription amount... However it's not running very smooth on my mobile (LG q6) so I deleted the app. But every month I am being charged though I don't use it anymore... Plz suggest how can stop those monthly subscription charges?? Tha ks in advance for your help...

P.s this is the first time I ever subscribed for something so don't know how to get unsubscribed.

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