Are you reviewing the product or the seller?
I’d only amend the review if the product I’d had was a bad example. If you’d received the item – reviewed it as crap – and they’d replaced it and it turns out the products are typically perfectly good and you just had a turkey then you would want to amend the review to reflect that. So the review is fair.
But if all the seller has to offer you is a refund rather than replacement – then that suggests the straps are typically the quality that you’ve experienced.
Seems like a decent seller if he refunded you
So he’s only wasted your time but not your money 🙂 – You could point out that the seller was nice enough to refund – but under distance selling regs he doesn’t actually have the choice so its no real courtesy. However he’s not nice enough to want to allow other buyers to make an informed purchase.
Amazon has recently banned ‘incentivised reviews’ – whether asking/encouraging a seller to remove feedback comes under ‘incentivised’ I’m not sure.