Buy Online: e-Commerce Customer Service, contacts, ratings and reviews

You can find information, contacts and review about all the most important Online eCommerce and ecommerce services, you can rate your favourite and comment your experience with Customer Service.
Buy online can be cheap but we have to know website and its support we use for transation.
The list below is is costantly updating.

Amazon Customer Service

Best Buy Customer Service

eBay Customer Service

Fedex Customer Service

Wal-Mart Customer Support

Tesco Customer Support