DramaBox charged me after I canceled my Google Play subscription — requesting a refund

My weekly Drama Box subscription, which I purchased through the Google Play Store, was canceled before July 6, and I was clearly informed that my access would end on July 6. Despite this, on July 13 an additional amount of 5.69 was charged to my account for another week of the same subscription, even though I had already ended it and did not authorize any further renewals. I request a full refund of the 5.69 charged on July 13 and confirmation that my subscription has been fully canceled so that no further payments will be taken from my account.