You can try suing.

You can negotiate with the debt collector, change the location of the door, make an appointment at a coffee shop, etc. Because they will be notified before coming to collect collection. Correct your attitude. Regardless of whether you accept the door-to-door payment or not, you must lower your attitude. After all, the debt comes first. The door-to-door payment is just to collect the account from the bank. There is no need to intensify the conflict.