ALL STAR NO LONGER THE SAME

I ORDERED A PAIR OF ALL STAR SNEAKERS ON EDGARS ONLINE ON THE 30/01/2017 AND RECEIVED THEM ON 31/01/2017 - I WEAR THEM OCCASIONALLY BUT NOW THE SOLE OF THE SNEAKERS IS COMING OFF. I USED TO WEAR ALL STAR FOR MORE THAN 2 YEARS BUT NOW IT LASTS FOR A FEW MONTHS? I HAVE ALWAYS BEEN A LOYAL CUSTOMER TO SUCH AN EXTENT THAT MY WHOLE FAMILY HAD THE SNEAKERS BUT I DO NOT THINK THAT I WILL EVER AGAIN BUY THEM - THEIR SNEAKERS DOES NOT LIFE UP TO THE NAME ANYMORE.