Amazon — item charged to my credit card

Address:	30290
Website:	Amazon.com

Three items listed on my credit card that are not on my order list from amazon.
August 6, 2018 for $6.95 reference # 24692168215100712512357. August 6, 2018 for $16.08 reference # 246921682141100144976279. July 31, 2018 for $21.92. None of these items were purchased or received by me or any family members. Please remove them from my credit card. It seems that these items were books. I do order a lot of books from amazon, however, i did not order or received these books. Please help me to recover the money on these items or tell what will be my next step to recover my money. Thank you for your help!