Shortmax Subscription Not Cancelled - Charged After Google Play Cancellation

I had a subscription with Shortmax that I cancelled on March 9 through Google Play. Despite this cancellation, I was still charged again on March 16 and March 26, with a total of 39.98 taken from my account after the cancellation date. I removed the subscription in Google Play and followed the normal cancellation steps there, but the payments have continued. I was then instructed to contact this website regarding the issue, which is why I am now submitting this complaint. I request that the unnecessary charges made after March 9 be fully refunded and that my subscription be completely cancelled so that no further payments are taken from my account.