cant read i-book on my pc

The majority of ibooks cannot be read on windows computers, only on iOS devices and Mac computers (with Mavericks or Yosemite as their OS) - only those without digital-rights-management on them (e.g. free ibooks and those from publishers who don't include DRM e.g. O'Reilly) can be read via apps such as Calibre

An ibook's requirements should be listed on the left-hand side of its description page in the store e.g. they will have something like :

Purchases are considered final but you can try the 'report a problem' page to contact iTunes Support and see if they will refund or credit you : http://reportaproblem.apple.com

Or you can try contacting iTunes Support via this page : http://www.apple.com/support/itunes/contact/ - click on Contact iTunes Store Support on the right-hand side of the page, then Purchases, Billing & Redemption

(As we are fellow users here on these forums, you're not talking to iTunes Support nor Apple, I've asked the hosts to remove your email address from your post - it's not a good idea to post it on any public forum, unless you like spam email.)

rvthor wrote:

I do not have an i-pod or i-phone or i-anything and do not plan to purchase one.

If you are a non-apple user, it makes no sense to buy things from Apple's bookstore. Instead you need to go to one of the alternatives: Amazon, Nook, Kobo, Google, Sony.