I had the coupon and decided to buy some medical supplies from the website www.goodrx.com. I choose the supplies and provided the coupon number, but the website didn’t accept it. It showed that the coupon number was invalid. It must be some mistake. I ordered from them, but decided to ask the seller about it. It was strange, but the customer services didn’t work at all. I’m waiting for the order, but the seller didn’t respond.