Whoa...maybe you can PM James on this forum and send him your story. I think what you've been though is just plain wrong.
I sure love Kobo products, too - but no one should ever have this type of customer service experience. The first person you spoke to should have offered to send you a courier envelope to ship your 'cancelled' Vox back in and upon receipt, immediately reverse your credit card charge.
Personally, I would have called and demanded one...and if I didn't get one, I would've walked into my local Chapters store and dealt with the manager there. Poor Chapters...they sure have to take the brunt of all this crap...