In the US we have the FDCPA, TCPA, the state version of the FDCPA and the FCRA to use against debt collectors. All of them provide for the debt collector to pay you for their bad behavior. Each one has their own amount, but the FDCPA is $1,000 alone. It can get costly for them.

Good write up:)

If you’re in the US just search the above acronyms and then you can have the legislation to apply what @wwf has pointed out.