I bought two books. One with 50% off, the other with 30% off. I kept getting processing errors on book one and an instruction to please try again. At the end of it, I was charged three times for that book. I have purchased about 150 books from Kobo and this is the first time something like this has happened. Cyber-Monday?
In any case, I wrote to
help@kobobooks.com, reported the problem and quickly got an automated response. If I do not get a human response in two days, I will post the question reference number and the details of my complaint on getsatisfaction.com/kobo, the official support site for Kobo.