Thank you for posting your question on the Mellanox Community.
When using Mellanox OEM adapters, the OEM is the channel who will provide the certified s/w and f/w for the adapter. When installing the driver from our website, you are running into the issue, that the f/w of the adapter is not being updated as we do not provide OEM adapter f/w in our driver bundle.
It is strange to say that Cisco does not want to assist you any further, as first this is their responsibility and second, it is an easy answer for them to your question.
This driver bundles contains the correct f/w version for your PSID. You need to re-install the driver for the adapter through, so the f/w can be updated through the WinOF-2 driver executable.