My Mother is in the midst of dealing with Homecenter.com as well.
They gave her incorrect item information and went ahead and shipped the item despite cancelling the order. I may need to intervene on her behalf, as it appears they charge a 25% restocking fee OR a 20% exchange fee. RIDICULOUS.
Please report your experiences to the BBB in NY where this company is located. To protect yourself, pay with a credit card. Filing a report with your credit card company may be the only way to get your money back.
Always visit the company's return policy page before placing an order to avoid headaches later!