I placed this order"NikeProTherma-FitHyperwarm" by mistake in March and then I cancelled soon after and I got charged £55.66 but still not got a refund. I contacted the seller but they failed to resolve the issue. I need help
Buyers can request cancellations but it's the seller who has to issue them. It's too late to do anything via ebay but contact your payment provider and ask about a refund or chargeback.