You'll need to cancel a subscription on your credit card directly with the retailer and retain proof of the cancellation as you may need it to obtain a refund if they continue to bill you.
If you are unable to get in contact with the retailer then you can let us know let us know by filling out our online form and we may be able to help.
We cannot assist with cancelling subscriptions or obtaining refunds once the renewal date has passed unless you have proof of cancellation.