Google Colab Pro Charged Me After Cancellation and I Am Requesting a Refund

I had previously purchased a Google Colab Pro subscription, and I thought I had canceled it. However, there seems to have been an error, and the subscription fee was charged again this month. I immediately canceled the subscription about 10 minutes after the charge was made. Although there are still 30 days left in the subscription period, I won’t be using it, so I would like to request a refund for the charge that was just made. However, I am having trouble contacting support regarding this issue. Could you please assist me with this request?