This is dynamic collection agency did not answer

Called me and no one was there. Deal silence.

CALLED ME AT WORK. ADVISED HER THAT WAS ILLIGAL

Debt collectors have selective amnesia when it comes to "don't call me at work". Send them a letter VIA certified mail with return receipt requested instructing them your employer does not allow these calls and they are to call you at home or communicate with you VIA USPS. This is your right under the FDCPA. If they continue to call after you have proof they received your letter, you can sue them.