I tracked them down and filed for a refund. Panda responded by telling me to send my proof-of-purchase to a US postal address, which was returned to me as undeliverable because they had moved away and it could not be forwarded! So I kept after them, and they sent me their correct address. Fortunately both times I used Certified Mail.

Then began weeks and months of neither sending the refund nor responding to communications by email and telephone. I even wrote to the feedbackCEO email address to CEO Juan Santana. He could have easily forwarded that message and said "this is unreasonable and disreputable of Panda Security, an Internet-security company; please take care of this customer ASAP." But no response at all from Santana. After four months of no satisfaction I contacted the Better Business Bureau of Los Angeles. Almost like magic, I had an immediate response from Panda! It took another 2.5 weeks to post my refund check -- exactly 5 months and one day after my purchase. Panda Security evaded by giving two false addresses (electronic and physical) and then reacted only when they were all-but-physically forced to do so because of formal complaint to a third party. BBB of LA was awesome and stayed on top of it through a very user-friendly electronic complaint process.