What I have found with Zavvi recently in the last few months
They delay taking payment and despatch on some orders but not all orders some are sent at the usual times you expected your order be sent
When you use a discount code that used a link and code provided to one of us members and we pass on that link and code and this is used by a member who did not get that link from Zavvi originally sometimes your despatch and payment taken is delayed
The few times this has happened they did not despatch my order until release date or the next day
Not sure of the purpose of them doing this as they still end up taking payment and despatching the order anyway it's just later than usual
You can expect your order be despatched on Mon or Tue