The next day delivery does not deliver on the day you expect even when all the items are in stock.
Try calling the service team and they don't care a damn... so organising with workmen is impossible. Just rubbish that deliveries arrive many days later than they say... I'm still waiting, should have been here 3 days ago now and we are furious.
Call and they have a bad attitude, they lie to get you off the phone and leave you hanging with no idea when it'll arrive. Quick to take your money though!