I went through similar with GenX.  I was really hoping to get that on sale, and finally got it, then it was a LOOOOONG time and no activation code?!?  Finally, I just got mad and said forget it, give me a refund.  Guess what?  Surprise, we have just found some activation codes, LOL!  I still decided to take the refund.

...but, from a neutral standpoint on your issue.

I don't know the details, but lets say you bought a 1 year membership at $100, and used it for 6 months, then they screwed it up...I could see a $50 reimbursement, or something similar.

On one side, you got benefit, on the other, you did not get full benefit as promised.

I would take a step back, have a cool drink, and then work with them a little.  They screwed up, but it sounds like they are trying to work it out with ya, at least.  That's more than you get sometimes in this world!  :)

Good luck!