Ignore them. Discard their questionnaires and ignore their phone calls. They should eventually give up.
Answer de phone and say “bueno” and “no comprende ingles”. Might as well get so e benefit fom amnesty, right?
I got the community something or other form that asks for a lot more info. I didn’t open it; put Refused on the envelope and sent it back. I kept getting phone calls for several months, which I ignored; and then nothing.... this was over a year ago.