I had the same issue. When i chatted with one of Xfinity Moblie customer care, they provided the details of Xfinity Reward Center customer care. When i called them, they asked my details and said they will re-issue a new card with same value in 2 to 4 weeks. In my case, i activated the card but never used it. Not sure will that work with un-activated cards or not.
You can give a call at 1-800-526-3268 Monday through Friday from 8:30 AM to 5:00 PM ET and check with them.
I forgot about the promotional card and it expired. I tried about everything. Attempting to call the card company was useless. Called the number you gave and they renewed the card for 6 months without a problem. Thanks for the info.
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