We had the same experience, didn't realize we needed a separate card. I called and the priority passes have been received - now that we are home. Will use them next year. Wasn't advised about being reimbursed, will give them a call on that.
Also, regarding the $300 credit per year, I was told the credit is per membership year, not calendar year. so if you joined in November 2016 and received a credit you will not be eligible for another credit until November 2017