e change the batteries severl times it didnot resolve

i purchased leappad notebok two years this coming christmas I also purchased new books my son been unable to use the pad following along with the pen automate voice repeats the same words over and over . changed the batteries several times it didnot resolve the problem he HAS LOST INTEREST IN THE LEAPPAD I WNT TO KNOW WHAT CAN BE DONE AOUT THIS WALMART WLL NOT RELCE BECAUSE NO RECEIPT ND THE LENGHT OF TIME. WILL LEAP COMPANY STAND BEHIND THERE PRODUCT WE REALLY WERE SATISFIED WITH THE LEARNING MATERIAL WE USE OTHER LEAP PRODUCTS.AT THIS POINT I WOULD LIKE TO TRY LEASTER I WOULD LIKE TO KNOW I WOULD NOT HAVE THE SAME PROBLEM. I WOULD ALSO LIKE TO SEND BACK THE LEAPPAD.