Can’t find person on snap; they can’t find me

A while ago they unadded me, I tried to add them back multiple times and since then their account disappeared. I assumed they had me blocked but they don’t, and now a few months later I can’t find their account and they can’t find me. Snapcodes say ‘something went wrong’ and our exchanged usernames don’t show our accounts at all on the search. How can this be fixed?