Hi Darlene
Don't be tensed. Get a piece of paper and write a debt validation letter requesting for the complete details of the account. Tell the company that you need to verify the account before you pay them anything. Send this letter through certified mail with return receipt requested.
You must also mention in your letter that you refuse to be contacted at your place of work and all correspondences should be done in writing. This is a cease and desist clause and the company must follow it. If they don't do it, you can file a class action lawsuit against them.
After you have put the request for the complete debt details, the company is required to respond with the information. If they are unable to do so, you can explain the situation to the credit bureau and urge them to investigate on this matter. They will be able to give you the results within 30 days after receiving your letter.