Well, based on what you yourself said, clearly they did NOT send you 75 Instances (which would indeed protect only 37.5TB) but rather they sent you the Capacity license, which was correctly set to the required value of 75TB. At least this is what you claim to be seeing in the UI, quoting:
pufferdude wrote: ↑Jul 12, 2023 8:43 pm Veeam granted us 75 instances of "capacity" to continue to back up our NAS for the next year. The license UI in our B&R server shows "Capacity (TB) 75 (0 used)"
So, it would appear as a mere misunderstanding between you and your rep. So, just explain they misunderstood (or overlooked) the fact that you actually have a Capacity license. These are much more rare indeed and I guess it just did not "register" with your rep, with them automatically assuming you have an Instance license and answering the question accordingly. It's normal, people make mistakes, especially when they have many cases/emails to work through.
And guys, please remember these are
R&D forums. We are a separate organization from Support, Sales, Licensing, Pricing and other. It's really not the right place to escalate issues you may be experiencing with the employees those departments, or come to "laugh at their incompetence" here, or to make statements about "pure greed" of Veeam as a business etc. simply because none of the perceived issues have anything to deal with R&D, nor can be addressed by us.
On the other hand, Veeam loves feedback and has always provided the process to escalate any issues directly to the management teams of each and every department. This is well documented in the forum rules displayed when you click Post Reply or New Topic. Kindly, use those means rather than just posting everything on the R&D forums by default. So we R&D folks could spend more time working on improving our products, and less time going through and replying to feedback on other departments
From the product perspective, I can only repeat and confirm that you are all set: you need to protect 71.5 TB of production data and you have 75TB Capacity license installed. So, you should not be discussing this with your SALES rep to start with, as they seem to have issued you the correct license. Rather, you need to have our Support review what other workloads may be consuming said 75TB license without you even realizing. Or perhaps there are none and that's just some bug, which we R&D will then be happy to fix for you. Either way, it should be immediately clear from the logs.