I have a current issue with XXXX XXXX. They agreed to pro-rate my last invoice. They forgot. I have made several attempts to resolve. I owe for XXXX. 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 XXXX weeks or so. Each time they called, I disputed the debt. 

Today I spoke to XXXX 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.