Sorry to hear how much this has upset you, let me try to address a few of your points.
The O2 stores don't know what tariffs will be available for what handsets a month in advance. Things, especially this year, are actually moving really quickly and deals are changing all the time. We received an email the other day saying the iPhone 5 was free for staff on a certain tariff for the next 2 days only - that's how quick it went!
version7point0, who posted on the previous page, works in an O2 store and should be able to discuss what offers are currently available with you should you want to make sure you are taking out the best deal.
CPW, as you have noticed, may offer better deals on handset prices and things - but unfortunately you can't apply friends and family discounts to any contracts purchased from them. If the person in the O2 store knew you wanted the discount added then they shouldn't have sent you there - that was a bit silly on their part.
Luckily you have a change of mind period. With O2 directly it is 7 working days but I can't remember exactly what Carphone Warehouses is - but you can cancel with them and retake the contract out through an O2 shop, the O2 website or over the phone with O2 and when it comes you can apply for the friends and family discount.
Hope you manage to get everything sorted - as you have 4 contracts I know it is important that you are getting the best deal and the best service on them all!
