Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Disappointed

5 weeks and 11 telephone calls have passed and yet my son still does not have an RCX box (yellow brick) that works, rendering the system useless. It took 5 telephone calls, numerous transfers to various personnel and hours of wasted time just for the technical support people to concur that the yellow brick was indeed defective. Although there have been many promises to return phone calls,check into the situation and/or send a replacement part, it has not happened (only 1 of the 6 promises to return a phone call occurred). The customer support does not have the ability to directly send a replacement part, they apparently have to go through another company, which they have no control over. Buy this at your own risk, hoping that the parts all work.