Amsher Collection Services, Inc. Debt Collection Complaint

Amsher Collection Services, Inc. Debt collection department,

Other (phone, health club, etc.) Cont'd attempts collect debt not owed Debt is not mine Missouri

I have a current issue with - -. They agreed to pro-rate my last invoice. They forgot. I have made several attempts to resolve. I owe for -. They stated, once, they were going to pro-rate the debt. I agreed to send them what I owe them. Amsher Collection Agency has called me several times over the past - weeks or so. Each time they called, I disputed the debt. Today I spoke to - at Amsher Collection Agency. She said the dispute ca n't be verbal but mandatory, must be in writing. I asked her to check because I thought she was wrong. She went on to say in order to get the dispute process started I must make a goodwill payment, what? She then repeated her statement and said yes I have called several times and claim I do not owe the debt but dispute must be in writing.