(US) Hive.com - unable to cancel

I was visiting my brother and ordered a pizza from a local pizza restaurant. Hive.com came up as the delivery/payment system. After creating an account, it took me to a porn website and there was a message that said the first day is free and there will be a $60 charge each month until I cancel. They provided an email address and a phone number to cancel. The email came back as undeliverable, and the phone number says it's in Denmark. Is my only option to cancel my bank card?