Here are the steps to backup your Contacts to SD:
If after this reset and your phone still cannot charge, it is a hardware issue. You will have to call Samsung phone support to have it send-in for repair or replacement.
Mobile phones 1-888-987-HELP(4357)
Mon - Fri : 7am - 9pm (CST)
Sat : 9am - 6pm (CST)
Please let me know if you have any questions or concerns. Thank you!