Bests & Worsts Reviews from Amazon

I ordered two Samsung Galaxy S3 replacement batteries. I received two batteries in plastic with a tag labeled "Samsung Galaxy S3 Replacement Battery (2100 mAh) for AT&T, Sprint & T-Mobile Models - NEW", but they are NOT. They are the wrong size (shorter and wider) and do not fit my phone. When I tried to submit a return or replacement, it says that no returns are available because item is out of stock. That doesn't make any sense anyway! Besides, when I went in to purchase another one, it says it is in stock. I am very disappointed and have lost $20.