Thailand trip for chassis

I went to Chiang-Mai, Thailand last week. That trip was just 3 days for chassis out-of-spec issue. The chassis is certain an NG part without doubt. Even an RD engineer, vendor side, has confirmed with me but vendor still deny to admit this issue. Finally, they checked with their RD and understand what customer and I mentioned about. The report for the issue is delay for two days to release. What can I say? There is always has bad vendor with you project. :-(

I thought our customer also think is my way. :-P