Instruct: Classify the given Amazon review as either positive or negative.
Query: Buyer Beware...Customer Service Non-Existent

When I received the chair is was short one caster. I contacted parts@sprich.com as the instructions said to do. Four weeks later and I still have not received my part. I called the 800 number they have listed and even during stated business hours I only get a voice mail and my calls are never returned. The chair is nice, but if you have any problems with it beware that customer service is non-existent. I wish retailers would not sell products of companies that do not stand behind what they sell and do not practice at least a minimum level of customer service. It appears I now will have to return the whole chair over being short a caster.