Dreameshort Subscription Can't Be Cancelled

For some time I have been trying to cancel my Dreameshort subscription and the “you can cancel anytime” promise is not being honored. The app does not appear in my Google Play subscriptions, so I do not have the standard option to cancel it there. Inside the Dreameshort App there is also no visible way to cancel the subscription; on my profile screen it simply shows the account as “on hold” and offers “DRAMA PASS” activation, but no cancel button. Despite this, the app has repeatedly tried to charge me 15.99 USD several times a day for the last few days, even though I am not using the service and do not wish to use it. From my debit card, 15.99 USD has already been successfully taken on 26 June, 2 July and 9 July. I did not knowingly agree to such a charge pattern and I cannot manage or stop it through Google Play or within the app. I cannot find any clear way to contact Dreameshort support from within the app, which makes the situation even more frustrating because I am stuck paying for something I do not want. I am asking Dreameshort to immediately cancel this subscription and stop all further payment attempts on my account, and to send me written confirmation that my subscription has been fully terminated so that no further charges will be made.