Cancel My Subscription Immediately

I have been experiencing a serious problem with Reelmira regarding the cancellation of my weekly subscription of $24.99. I originally started this subscription through Facebook and, for about the last three weeks, I have been trying to cancel it without success. On their website the cancellation option is hidden or made very difficult to find, and despite my efforts I have not been able to cancel my subscription. I cannot even find their app on my phone anymore, yet I am still being charged $24.99 every week. This situation makes me feel that the cancellation process is deliberately obstructed. I have contacted Reelmira customer service about this issue but I have not received any response so far. I would like my weekly subscription to be cancelled immediately and the unjust charges made during this period when I have been trying to cancel to be refunded to me.