I have been getting these calls for about a month. At first there was no voicemail and the other day there was. "Very important I contact about my account. Citibank\BestBuy, a problem with my account, visit www.BestBuy\accountonline or call 1-855-242-6899" I was unable to locate the website so I called. I have a Corporate Citi Bank account but have never had a Best buy account. No problem the lady said, apologized and now they leave massages 3 times a day. I block the calls.
 Feb 01st, 2016
Another source indicates that this number is associated with the billing department for Best Buy.
 Jul 13th, 2015
Ooops from CA below may think this is Citi calling for a legitimate debt collection, but I received a call from this number on my cell phone this morning, and when I answered the call all I got was a hang-up. I do not have a Citi card, or any connections to Citi in any way, shape, or manner.
 Jul 13th, 2015
This is Citi calling in regard to a late card payment. They left a courteous message asking for a call back. Don't complain about getting a *courteous* call from someone you owe money to, especially when it's your own fault that you didn't pay them on time. I am taking care of the late payment today BTW.
 Feb 27th, 2014
Seems like fraudulent call. Certainly a harassing call procedure
 Feb 18th, 2014