1) Their sales demos (which we recorded) pitched functionality that literally did not exist or was EOL'ed from the system without a replacement before we implemented.

2) It was a fixed-price contract, and when they screwed up & couldn't deliver on their benchmarks, they refused to continue working without additional payment

3) Paid customizations were developed in bad faith & without the contracted specs. In one example, there was a simple requirement: Users could enter a long blob of text, and clerks could review it as part of the user's record in Peoplesoft. They delivered the first part, not the second. When we asked where that functionality was, they said they didn't need to build anything more because the data was available to clerks via the assistance of a DBA.

The implementation failed, we got a settlement, and chose a different vendor while out Legacy system limped along for a few more years.