This company keeps changing their phone number. They say they are with Global Frontier they tell you, you have changes against you for bad checks. I called back 4 times today and they want you to give them your SS number. Finally on the 4th call back they didn't ask and told me I had written bad checks and they were trying to decide to turn this over to their client. What is really scary is that I have never had a bad check. I don't have any bad debt yet they had old information about me from 2000, 15 years old. Old last name, old place of employment and so on. These people keep changing their number and who they are. If you ask them for information I really think they make it up. I have blocked them but how do I get them to stop? they have been hounding me for three years now about things I can 100% are not my debt and every time I tell them, they come back with different info. Any ideas how to get rid of these people?