think you will find this is coming out channel islands as there deliverys usually take 4-5 days now and have been for last 6 months or so.
can't blame royal mail for where zavvi post from!
hence why zavvi customer services in one part of the country and delivery from a warehouse in channel islands they are not connected only by a computer and neither really knows what the others upto unless they email each other. hence all the standard responses from cs and also with a official release date a week away they don't have to entertain anything until 14 days have passed (uk)after dispatching with royal mail anyway to be considered missing anyway. so worse case is they post on the 14th and doesn't turn up but they don't have to anything until 28th because is lost.
i can understand the frustation but suspect not alot is going to change here, the only real way is try vote with you feet a bit more and source else where other releases if you feel about badly about zavvi imho.
personally i got this coming from gb for best buy release and thats not released for another 3 weeks and then goto to be shipped from the states which prob add another 1 or 2 weeks on top.
it happen when it happens, people should just try relaxing a little bit more. hate to think what would happen if some that upset now had a blufans release coming which usually from point of order to delivery can take a year to get
basil