?Is the Kindle reliable for solving purchasing problems?

Good afternoon The vast library of e-books that I can find on the Kindle e-reader amazes me. Can you tell us more about the reliability of Kindle customer support when it comes to resolving problems with e-book purchases? Have you had a similar experience or do you know about it from others? Has anyone encountered problems purchasing e-books on Kindle and how did the support team deal with them? How can I explore different genres, authors and topics without any restrictions?