I'm sorry to hear that you've been receiving annoying phone calls that claim to come from First Data. However, we have no record of that number as being one of ours, so I do not believe those calls are coming from First Data. And we don't like it any more than you do that somebody is using our name to annoy you (or worse).
We're investigating to see what we can do to identify who owns the number. However, Caller ID spoofing is relatively easy. Even if we can identify the owner of the number, that doesn’t necessarily mean the calls originated from the legitimate owner of the number.
Finally, while I can confirm that the woman at 303-967-8000 is very nice, calling her isn't going to help identify the real source of the calls.
Today they called TEN times in under TWO MINUTES! I have them blocked so they receive a busy signal. They just keep calling over and over and over and over.