Here Chatterbox found Amazon's corporate address and phone number in Seattle. Chatterbox dialed the number, asked for the customer service number, and was given it. (Only after going through this exercise did it occur to Chatterbox to search Google for Amazon.com customer service phone number.. That turned up a few non-Amazon sites that give away its customer service number.
You may also be able to prevent or alleviate muscle cramps in your legs by making simple lifestyle changes. Drinking plenty of water is essential, since cramps are often caused by dehydration. A healthy diet with plenty of fresh fruits and vegetables can also help to decrease the frequency of leg cramps.
Leg cramps that occur randomly are usually caused by mineral deficiency, but those that occur specifically during exercise could also result from inadequate blood supply to the muscles.