Debt collection — Simon's Agency, Inc. (NJ)

Attempted to collect wrong amount. I am unsure as to where this is furnishing from and why, but I noticed on my credit report 3 separate amounts reporting XXXX, XXXX and XXXX. I never received a bill for this at all, nor am I aware as to where this is furnishing from. I then found a bill with a single item of XXXX which is the sum of these three amounts. There is no itemization whatsoever on the one bill received. Again, I still don't even know what this bill is. However, why is a single bill being reporting as three separate items to my report. Is any of this even legitimate.