TheBestPDF Unauthorized Subscription Attempt Charge

I am writing regarding an unwanted subscription and a payment attempt on my bank card by the website/service TheBestPDF. I registered on this website and entered my card details to use their editor service for only one day, with the understanding that it would not result in such a large, ongoing charge. On April 6 and April 8, I noticed attempted charges of 2,485.31 on my bank card under the description TheBestPDF. Fortunately, these attempts did not go through because I did not have sufficient balance, but I consider this situation very concerning and I do not accept any current or future charges of this amount. I request that my subscription with TheBestPDF be immediately cancelled and that no further charges or payment attempts be made on my card. I also ask that any potential charges linked to this subscription be fully cancelled or refunded if they are ever processed. I would like written confirmation that my subscription has been terminated and that my card details are removed from your systems so that I am not charged again in the future.