Need some advice from other indie makers.

A customer that I have in requested a refund because I had two typos in the copy of one template, and he claimed it was broken. As soon as they emailed me, I corrected the typos...that he would have had to change as soon as he used his copy. My refund policy explicitly says once downloaded/forked there's no refund, because there's live demos to see how they work and these are digital assets.

The templates are fully functional, so I explained that a couple of spelling mistakes don't make the product "broken", since the copy is placeholder text...

Since then, this person has sent around 10-12 emails claiming there are major issues across my templates, which are not true, I went ahead in case I missed something, and nothing had happened...

The strange part is that the screenshots don't match my live demos. In some cases they're zooming in/out the browser to make layouts appear broken, and in others it looks like they've modified the template locally before taking screenshots.

The emails are all written in the exact same AI-generated style, repeating the same claims across different themes.

I update and maintain these templates constantly, so I'm confident the issues they're reporting don't exist in the actual products.

At this point it feels more like harassment, testing their new AI email app than a genuine support request.

What would you do in this situation?