My goodness, a few people answered the mystery--it's OneLink telemarketing (trying to sell additional services). It's amazing that everyone just ignores these comments and acts like it's potentially a scam or fraud.
They called from 787-474-7372 / 787-474-5330. They left a message from "Banco Popular" they need me to call as soon as possible. I don't think this phone number belongs to BPPR.