I find many debt collectors simply don't accept the fact people move and get new phone numbers. I have had my number for 9 years.
I still get calls from debt collectors to the prior owner of my phone number. I called Allied Interstate from my Google Voice account and gave them my real name and told them I didn't have any outstanding debts. They didn't find my name in their system. No surprise.
I asked them to remove my home number from their call list. They could not find my home number either.. Somehow I don't believe them. Who would forward their number to mine to avoid a debt collector and not expect to have family and friends calls forwarded too.
Somehow I expect them to keep calling. Several other collections companies are still calling.
At least they acknowledge the phone number used to belong to a Jeromy and Emma. Last name of the debtors withheld.