When did that happen to you? Recently ClickBank has disallowed the vendor to change the refund request more than once, because vendors were abusing the system. Here’s what Clickbank put out in April of 2011:

“To prevent customer complaints, vendors should not close refund request tickets or switch tickets from Refund to Tech Support more than once, and the latter should only be used when actually trying to help the customer and save the sale.”

You can read more warnings that ClickBank sent to vendors here:
ClickBank says vendors should stop violating FTC Guidelines

I would contact ClickBank and tell them what happened – AND point out that it’s something that THEY themselves are trying to fix.

If you don’t get your refund within 48 hours, I’d file a dispute with your credit card company. The dispute procedures are usually on the back of your credit card statement. If you paid by debit card, you’ll need to talk to your bank.

Alternatively, you could skip contacting ClickBank and file disputes directly.

Either way, if you can let people here how it turns out, that would be great.