Bidvest Waltons shocking customer service

My husband bought an inverter off of the Bidvest Waltons website last week. After waiting with no response from the company we queried our order and was subsequently told they had no stock, we questioned that fact and then excuse changed to we were trying to source stock for us. They then stated that it was incorrectly advertised and there is no stock available, however the product was placed back up on the website over the weekend at the updated price. It has been consistent back and forth feedback with excuse after excuse. We have all of the information documented and still no acceptable response from the company!