As a fomer employee, I can tell you for a fact that Montesquieu is the bottler. the wine you bought could've contained wines from all over and anywhere.
When we were instructed on how to sell the wines, we were told to follow the script and make the customer feel as though they knew nothing about wine and that we were the experts. In fact, most of the sales people knew nothing about wine.
In order to work for this massive telemarketing wine bottler you must be relentless in your bullying and putting the customer down. Knowing about wine is not a requirement, only a a knowledge of how to read from a script and drop wine jargon.