RESOLUTION: I reported this issue via PayPal. Their process is that you first message the vendor via their system and give them up to 2 weeks to reply. After about 10 days with no response, I escalated it to a complaint, which prompts PayPal to conduct an investigation. Almost a week after that, the owner refunded my purchase. Now I have to wait 7 - 10 days for PayPal to put the money into my account. What an ordeal!
BTW, I did reach out to Motone, UK twice and never heard back. I don't know if they did anything about it, but I have to assume they did not since I never received a reply. I gather the UK outfit is reputable, but it's bad form not to reply in a case like this.