I cancelled my membership in person with California Tanning in Clifton, NJ 3 1/2 years ago. I was put into collections because I did not cancel via certified letter. I disputed and my collection account was closed immediately. Now 3 years later, I receive a collection letter from a new agency about this. California Tanning admitted this was an error (the old collection agency apparently did not notify California Tanning of closed cases), and all closed cases were sent to a new agency. California Tanning advised me that they would be contacting the new agency of this error and to close the account. California Tanning advised me that this might take a few days because this incident happened to many clients. In the meantime, I am receiving harassing collections calls and they are threatening to have this claim reported on my credit report if California Tanning does not call them today. I advised the collection agency of the issue but they would not believe me. What can I do to make sure this does not appear on my credit report?