I had my account locked by 'click and buy' because of an apparent issue with my click and buy account. There was no justifiable reason for this but had to get click and buy to e-mail itunes to get my account reactivated.
I know the pain you must be going through right now!There is a help no for Apple but I do not have it to hand right now and I also think you can run some diagnostics which can then bemailed to Apple.
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