Penn Credit XXXX XXXX XXXX XXXX XXXX, Pa. XXXX Ph. # XXXX, has been calling me about a medical debt they say I owe. On XXXX/XXXX/15 I sent them a debt validation letter requesting proof of debt, I also requested in the certified letter that they no longer make phone calls to my home, work, cell, or any third party. Penn Credit received and signed for the certified letter on XX/XX/2015.Now my XXXX year old mother is receiving phone calls from them looking for me. Penn Credit has all my information and their is no need to call anyone else. She received these calls beginning XXXX/XXXX/15, over 40 days after they received my letter. The certified letter number is XXXX XXXX XXXX XXXX XXXX. When I called Penn Credit I was hung up on by one of their associates after I was told it was MY JOB to call the original creditor to dispute the charge NOT THEIRS.