Hi Phil,
I'm sorry that the you're having trouble with your Acrobat online service. I'd be happy to help you, if you'd like to tell me the exact error you're running into.
If you'd like to proceed with a refund, please initiate a chat session with Adobe Customer Support. Click the Contact Us link at the bottom of this page: Contact Customer Care. Then, click the Chat button. (Chat is available from 7am-5pm PST, Monday-Friday.)
Best,
Sara