Duncan Solutions, lnc. Debt Collection Complaint

Duncan Solutions, lnc. Debt collection department,

Other (i.e. phone, health club, etc.) Cont'd attempts collect debt not owed Debt was paid California

I paid this contested parking ticket months ago and it was still sent to collections. After the first collection attempt I followed the instructions to prove the debt was paid and they are still attempting to collect it from me. When I call their phone number provided and attempt to speak to a human it hangs up on me every time. I want this stopped before it wrongly affects my credit. I have complete proof that the debit was paid and that the amount demanded is not correct.