Citibank Debt Collection Complaint

Citibank Debt collection department,

Communication tactics Frequent or repeated calls Pennsylvania

I am in the middle of a Debt Settlement program. I have explained this to One Main Financial. They have called my work and left messages. I ma a teacher and unable to accept calls at my work. I am aware of the debt and it will be paid, however, my company - will take care of this. They are harassing me and I am frustrated with their tactics.