. Now, you could call up and tell them you're filing a complaint with the BBB, which may or may not get you any action or resolution,
This will accomplish one of two things.
Him speaking to a CSR that doesnt care, will put him on mute and laugh/chuckle.
That CSR will just transfer him to the ERT department again.
Something to keep in mind, if you keep speaking to ERT you can get flagged as a trouble customer and then all of your calls will always be instantly transfered to ERT.