I ordered a calypso ergo operators chair but it came without the lumbar pump which is why I specifically ordered that chair. After contacting customer service they got back to me promptly but said the missing part needed ordered (as the chair back needed to be changed) and would be with me in 2 weeks. In addition, the chair was packaged quite poorly with a hole in the packaging box when it arrived and the internal chair parts not wrapped in any kind of protective plastic to reduce scuffs while in transit. The product itself seems good but ultimately a different chair model to what I ordered which was quite disappointing