Commercial Trade, Inc. Debt Collection Complaint

Commercial Trade, Inc. Debt collection department,

Medical Disclosure verification of debt Right to dispute notice not received California

I contacted - in the hopes that they could assist me in credit repair. They reassured me they could and would do what they could to make things better, stating it would take up to 6 months before I saw results. However, they decided to dispute many things on my credit report without my knowledge, even going so far as to creating letters and signing my name without my permission. They did this with the Commercial Trade Bureau where the lovely ( I use this with high sarcasm ) - - has been a nightmare to work with. I have contacted her twice asking the dispute be removed and she refuses to do so unless I pay her upfront. Is n't that illegal? Other collection agencies happily obliged to my request after hearing what - - had done, however, - has not. Please help me.