Adobe is trying to scam me - Lacie/Seagate redemption codes

I have had my account flagged. 

I redeemed codes that came with Lacie hard drives that I bought, for 1 month access to Adobe. 

I have now had my account flagged for "Fradulent activity":

"

This email is to notify you that we’ve detected suspicious behavior associated with the Adobe redemption code used to purchase Creative Cloud Individual.

In accordance with the above, you now have five business days to resolve this issue. At the end of this grace period, access to Creative Cloud Individual will be blocked.

To avoid disruption, visit our website to access support, information, and find the genuine Adobe subscription that works best for you."

This is completely untrue. 

Adobe support are claiming that the codes I used were "non-genuine and that was the reason your subscription got canceled."

The codes were genuine; and they worked, which of course proves the point.

I have been above board throughout this and Adobe are trying to steal my access.