The ones you get back from them are in much better shape than the ones at Walmart, so you will likely have greater success with the replacements. I have had them take their sweet time, and once I forgot about one that was behind a decoration and it sprouted after about three months. That was a lily.
I have also had the plant with a root or two break away from the bulb and the bulb grew new leaves and started a new plant, and the one that broke off is growing as well.