Unable to process redemption request

System will not let me redeem rewards to enter any sweepstakes or instant wins. Just gives me an “Unable to process redemption” notice.  I got on chat twice, and both times was told they would escalate to someone to resolve issue and that AARP would contact me.  So far, nobody has gotten back to me, and I still cannot redeem rewards points to enter sweepstakes or instant wins.  I am new to AARP and am very disappointed.  Very frustrating.