Charges for subscribing Docker EE for AWS for 750Hrs in AWS market place

I have recently used Docker EE on AWS (mid May) however I got a super $ bill start of this month. Its 1094.92USD for the May bill. I have cancelled all the subscriptions now. Not sure whether anyone came across this… (but hopefully no), AWS came back to me with full refund for AWS service charges on their side but they are not able to refund anything that Docker has charged. Any way to contact the customer support for this? I raised the ticket for technical support (may not be relevant because I cannot find any ways to reach out for help on this…)