Hi Anglika,
Thanks for your quick response. Here is a full paragraph in which this statement was used. Perhaps this will help you to make out exact meaning.
"When [COMPANY] mishandles an order, it does a bang-up job of it! Under the awful circumstances involved in your order No. [NUMBER]. I think your letter was a classic indication of patience and understanding. I am afraid I would have been more put out about this experience."
Peter