Brother: False advertising on Black Friday

I have a Brother MFCL3370CDW and I am pleased with it. I bought it from a store rather than directly from Brother as their website indicated all models not to be available, which was incredible. On Black Friday they announced a 20% reduction on toner which brought the TN223 4PK down from $350.99 to 280.79 under coupon BF20NKTN. I tried to purchase it online and after 4 unsuccessful attempts in which 4 different credit cards were refused I decided to wait a day and retry: same outcome. Order accepted, coupon included automatically, card refused. I decided to chat online with a consultant who after 4 communications asked me where I found that price and I had to explain that it was on their website for Black Friday! After 45 minutes she came back telling me that this specific item was not included in the discounts.
Their website clearly indicated that it was a sale item.
Their online ordering accepted the transaction.
Their online ordering automatically included the coupon.
Their online ordering refused "the credit cards" and not the item.
I asked before ending the Chart for a supervisor to call me back on my cell.
No one did.
I wasted 2 hours because of false advertising.
Is this a respectable company.
The answer is a resounding "NO".