GE not knowing their own part numbers - How unusual

After many phone calls to GE (Marquette) about a roller for a treadmill we were eventually given the part number, ordered it and the part arrived. This process took over three months with most of the phone calls to the USA at inconvenient times.
When the part arrived, it was wrong. GE reply was that they had delivered the part that was ordered so not their problem, and we should re-order with the correct part number....Arrgghh.
I think things like this should be taken in to account when deciding which equipment to purchase...Are you reading this GE?
Robert
Robert