Reply to really getting frustrated with NI support

So I had contacted them originally to clear off my Serial #'s for TSP1.0 and the TSP2.0 upgrade so that I could transfer them to a new user, and they did so quite promptly.

However...it's been two weeks since I'd sold my Traktor and it keeps saying the TSP2.0 Serial # is invalid. Both myself and the guy who I'd sold it to, have been in contact with NI Support.

They gave him TSP1.0 which he was able to register with the Serial#, which is fantastic. However when he tried to upgrade to 2.0 we still had the same problem. Upon contacting NI Support again they told him that he "needs a valid serial number".

Like seriously? wtf. Thank you for stating the obvious NI, however my serial # IS or at least WAS valid until I deactivated it...I'm seriously at my wits end with this shit and I can only imagine how the guy that bought it from me feels like. I've been courteous with the support and all they've given me so far have been one shot answers that haven't really gotten me anywhere.

Do any of you guys have any suggestions? I've gone through the NI website FAQ's and haven't found anything so far that helps