I'm really sorry to hear you're having trouble accessing the Pi Store. I've had some troubles on my home connection recently too, so you're not alone. I'll pass it on to the relevant people and I'll let you know if there are any details I need.
Thanks for reporting it.
As always, I'd be glad to hear from anyone else with the problem as well, just so we can build a fuller picture of what's going on.
Thanks for your time,
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