CDI is trying to collect debt which is not mine. I am not liable for this debt. I did not sign, oral, or implied to be responsible for a work related accident. I was ordered to have the ambulance my former employer called, when toxic chemicals were released in the workplace. I did not call the ambulance for service. I since recovered and all medical bills have been paid for this work related accident by the insurance, however, this creditor " XXXX XXXX XXXX " did not file a lien against the workers compensation case to get paid. I gave them all the information and yet they did not file a lien and said they have no one in the office that knows workers compensation procedures. I even sent them the forms to file a lien and told them when the case is closed the insurance must pay them before the case can be closed. They did nothing and now they are coming after me for their incompetence. They insist that I must pay and threaten me with legal action, and ruining my credit. I asked them to remove them adverse erroneous information from my credit report but they do not.