ShortsWave Subscription Issue, Needing Help

I have a weekly subscription with Shortswave and I have been unable to cancel it despite repeated attempts. Between May 31st and July 19th, the service has continued to charge my bank account on a weekly basis. I even replaced my card information, but the charges or attempted charges from Shortswave have still continued to hit my bank. I contacted Shortswave customer support regarding canceling my subscription and stopping these payments, but I have not received any response so far. This leaves me without any way to properly cancel or manage my subscription while my account keeps being charged. I request that my Shortswave subscription be fully cancelled immediately, that any improper charges over this period be refunded to me, and that written confirmation be provided that no further payments will be taken from my bank.