A program that grants points for using Bing search, which users can redeem for gift cards, sweepstakes entries, or charitable donations.
Sorry to hear you're having trouble.
As this is a Rewards related issue I would like to suggest getting in touch with them via https://rewards.bing.com/support and complete the listed form. Then keep an eye on your email including the junk/spam folder for a response from them.
In the meantime you may also like to consider starting an online chat with support via https://support.microsoft.com and click on Contact Us. Just follow the instructions on the page and say you need more help to get to a person. You'll probably need to add your phone number back to your account and if you can't via https://account.microsoft.com then you'll need help from support.