They dont do returns on Bettas (everywhere else do...

They dont do returns on Bettas (everywhere else does) and the girl whom I am intentionally not naming so she doesn't get reprimanded, she always makes me feel pressured into not buying a fish just because mayyybeee they won't get along. Ive been mixing odd types of fish for a long time. Also she recommended I get 3 female bettas, guess what? They killed each other. They're passive, they wont do that. Uhuh.