Ive had almost the exact same experience as the the below review someone else posted a month ago (copied and pasted at bottom). Only difference was it was a different product.
They said 3-5 days refund. Then asked for PayPal and it'll take 2 weeks. Money never arrives and then they fob you off with generic customer service agents again. Awful company and seems they do have a deliberate method of stealing your money as it looks like I'm not the only one.
“Pre ordered pop figures, they have been released for general purchase and still nothing from zavvi despite chasing since September last year. In April I cancelled the order, was told 3-5 days for a refund. Never came, so I chased and was told 7-10 days through PayPal. It’s now been over a month (May30th) and I’m still being told I’ll receive it shortly. Avoid at all costs, they will take your money and happily keep it.'