Can refunds in a Ecom store hurt SEO rankings or the PPC results?

I have a Shopify website that hires electronic gear, PCs, XBOX, Force back steering wheels...to clients. As part of the hiring process, I collect a bond for every hire. This is fully refunded once everything is returned.

I use Google Ads and work on various SEO principles to build my store's traffic. (Adwords and GA4) is installed. My issue is that I have increased traffic with the most relevant keywords that I know drive sales (by asking every client what they searched), but the traffic I get recently is not resulting in as many sales as it used to when I started.

So my question really is, can google drive different traffic through Google ads and penalise my site due to me returning a bond to each client? I'm assuming it looks to the google algorithm / Ai like I'm having to return "faulty/incorrect/wrong ... " goods for every sale.

Thanks for your help.