Business ProfileforWyckoff Heights Medical Center

I am completely fed up with Wyckoff's threatening and unfair billing practices. I paid my bill months ago and yet am still being told I have a balance and impliedly being threatened to have my account sent to collections if I don't pay them AGAIN. I have spent countless hours on the phone trying to settle this bill, and I've provided proof of payment that has been cashed by Wyckoff repeatedly, only to be told I have to call back in **** business days over and over again for them to process the proof of payment, and be given no assurance my credit score won't be affected or that the account won't be sent to collections. I feel like I'm being bullied into paying them again at this point or potentially see my credit score plummet.Wyckoff cashed the check that was paid by me to pay down the balance. And no matter how often I send them proof of this, they insist I owe them a balance. Wyckoff is either intentionally trying to make me pay twice or they are so incompetent that they are applying payments to the wrong balances. I don't understand how they can say a balance is due when I send them the proof of payment showing they cashed the check for the entire account balance!I expect them to reduce my account balance to zero and call me to let me know that it's been settled.