"Wierzyliśmy ci do dziś."

Translation: We believed you until today.

[yacenthy]

Wierzyliśmy Ci do DZISIAJ sounds better

[irenia80]

I agree with you BenYoung84, "had" is impossible. The best translation is "We have believed you", that is to say present perfect.

[Jellei]

I removed the "had" variant.

[DarthGandalf]

Is "trusted" wrong?

[Jellei]

That's "ufaliśmy" / "ufałyśmy".

[Jack.Elliot]

we did believe you until today

[MichaelKor436367]

The corrected translation sounds clunky in English. I think. We had believed you until today. We have believe you until today. ... crap, now not only can I not speak Polish, I am forgetting English, as well.

[Jellei]

Added 'had'.

[BenYoung84]

No that was a bad idea. You can't combine past perfect with "until today" - the present.

[Jellei]

I removed the "had" variant.

[Djx234]

Ubtil today we believed you. Why is this wrong?

[Jellei]

We could argue that that's "Do dzisiaj ci wierzyliśmy", but let's not split hairs. Added.