en_tn/isa/43/10.md

You

Here "you" is plural and refers to the people of Israel. (See: rc://en/ta/man/translate/figs-you)

I, I am

The word "I" is repeated for emphasis.

there is no savior but me

AT: "I am the only savior" or "I am the only one who can save you." (See: rc://en/ta/man/translate/figs-litotes)