I had a bit of an issue, their website kept saying purchase not accepted, so after two attempts I contacted my card issuer who said no, both purchases I’d tried had gone through. At that point alarm bells rang for both me and the issuer so we cancelled both purchases (the ones the site said hadn’t gone through).
I e-mailed Muziker re the cancellation, and their response was that the transaction was fine and I should soon receive my item. Well I didn’t, and no surprise really given that I’d not paid for it.