3rd party collecting agency for credit card haring me for payment,might lose job bec of them?

Send them a certified letter telling them they are not allowed to contact you at work, and be sure and keep a copy. A federal law, The Fair Debt Collection Practices Act makes it against the law for a third party bill collector to contact you at work once they have been notified in writing this is not allowed. It does not apply to the original creditor. If the collection agency continues to contact you after you've sent the letter and gotten the receipt back showing you sent it, contact an attorney at once.