ShortMax Kept Charging Me After I Canceled My Subscription, Request Refund

I am a Canadian customer and I had a weekly subscription with ShortMax Innovations for viewing content on ReelShort. I cancelled this weekly subscription on April 6, yet the company has continued to charge my card every week since then. Despite the cancellation, my CIBC Visa card is still being billed weekly in Canadian dollars under the name “SHORTMAX INNOVATIONS,” and the total amount taken so far is approximately 270 CAD. These are charges for a service I clearly cancelled and no longer use. I have not been able to reach the company to resolve this and therefore I am requesting that all charges made after April 6 be fully refunded and that my subscription and any related automatic payments be permanently cancelled so that no further amounts are taken from my card.