Large banks don't do collection work and don't call you 10 times a day. This all appears to be a scam and a violation of the Fair Debt Collection Practices Act.
Next time they call, tell them you want to talk to them and that they should stay on the line. Tell them you got authorization from you local phone company and police department for a "telephone tap" and you want to make sure there is enough time to get their phone number. Ask them where they are in the country and how the weather is. I suspect they will hang up and not call back.
Answered on Feb 19th, 2015 at 10:12 AM