Chrysler review: Reman. Trans failure

We are a chevrolet dealer that installed a chysler reman transmission in a customers 2013 jeep grand cherokee. The transmission was purchased from zeigler in kalamazoo. We flushed the trans cooler using the gm approved kent moore tool and it had a satisfactory flow rate. The trans was installed and filled, trans fast learn procedure was performed. The vehicle was roadtested and after 11 miles the transmission began to slip. Chrysler powertrain was contacted and we were informed that the selling dealer never registered the trans for warranty coverage. We contacted zeigler and the trans got registered. We again contacted chysler powertrain and initiated a claim. We sent the requested images and information, and the claim was denied because we did not replace the cooler. We were never informed that the cooler had to be replaced when we purchased the transmission. Our supplying dealer got a hold of Chrysler powertrain and a lead advisor called us and said he would cover under warranty if we would purchase and install a new cooler and lines and email him proof of purchase. We as instructed and the proof was sent. Receipt was not acknowledged but we proceeded with repairs to satisfy our customer. Another powertrain employee continued to ask for more images and i finally informed him that carl had already approved the repair. Carl sent an email asking why we proceeded and we replied that we thought he had granted approval with the condition that we replaced cooler and lines. No one will reply to our email