I'm not sure how to describe a habitual past event.
For this sentence, I did the same thing every day, and they didn't give me any new responsibilities.
I did the same thing every day, but they didn't give me any credit.
I did the same thing every day, but they weren't giving me any credit.
I think the first part should be past tense because there is the phrase every day, but for the second part of the sentence, I'm not sure if it should be they didn't give or they weren't giving.