Pella Window & Door Showroom of N. Little Rock

Worst consumer experience ever.
My wife and I were in the process of designing a home and receiving subcontractor quotes through our builder. We received a Pella windows/​doors quote through this office, but only decided to purchase a large 4-​panel glass door that would go from our kitchen to the outdoor patio/​kitchen. We received the detailed proposal and were asked to sign it. Prior to signing it, I informed our sales rep that we sold the lot we intended on building (which we weren’t even going to start for several months even if we kept that original lot) and had purchased land that had yet to be developed. I very clearly stated we wouldn’t begin the building process for several months to a year. The land wouldn’t be ready for construction for at least 6 months. I signed the proposal much like we had done with many of the other quotes and sent it back.
Fast forward a few months and we received a call from Pella saying our door had been in for a month and we needed to pay as well as pick it up. We had our builder contact this office directly and supposedly everything was cleared up. For what it’s worth, every other supplier/​subcontractor we came to terms with knew our timeline and nobody else had ordered anything. Nobody was supposed to order anything. This office knew as much.
Fast forward another 6 months and we receive another request for payment for the $ 4k door. Again, we contact our builder who again contacts Pella to clear it up. Pella all but admits error and simply says «thank you» after we seemingly clear the air about the errant order. Our lot is not developed yet due to delays caused by winter weather.
Another 3 months pass and I receive an email from this office who is now threatening us with turning it over to a collections agency. Less than happy wouldn’t begin to describe my feelings at this point. Our lot still isn’t developed and won’t be for another 3 – 4 months. We have no room to store this massive 4-​panel door that wasn’t supposed to be ordered until the proper time in construction. We never went to inspect the door for defects after notice it was mistakenly ordered ~1 year prior because we THOUGHT we came to a resolution and understanding that this office messed up. We have no clue if it has been stored properly this entire time and it’s entirely possible it has warped and is unusable.
Thankfully, we have been diligently saving money and can cover the cost to avoid them turning it to collections. However, we are considering legal action. You save emergency funds for true emergencies… unforeseen health issues, etc. You don’t save up to cover an unprofessional mistake by a window/​door supplier. Heaven forbid we actually need that money for a true emergency in the near future. This is the worst experience I have ever had purchasing something. We have been nothing other than clear about our timeline. What does clarity and several attempts at resolution (each time Pella seemingly admitting the mistake was theirs) earn us? A threat to turn it over to collections.
And to top it off, our sales rep has continually placed blame on new ownership for the reason each time they attempted to strong arm us into paying for their mistake. Ok. Companies should own their mistakes and also know that the long-​term damage in a situation like this far outweigh the upfront cost of the error. If only I heard the horror stories that are now popping up regarding this branch prior to agreeing to do business with them.