Panasonic — Unpleasant experience and delivery of old product

Address: Coimbatore

I purchased Panasonic 1.5 Ton split ac on 26th May 2022, They delivered 2020 model which was 2 years old with a different model number than the 1 that was in the bill, Now that I have pointed this out they asked me to come all the to warehouse to collect the model that was in the bill, when I brought the replaced model home, to my shock the model year has been erased by the team and delivered. This is an unethical business practice by the team