"Přestože nás neznají, nenávidí nás."

Translation: Although they do not know us, they hate us.

[dsarkarati]

I typed in this exact translation, but it was marked wrong.
Although they do not know us, they hate us.

[rejlmen]

I heard it like: Přesto, že nás neznají, nenávidí nás. Is it wrong?