"get back at you" vs "get back to you"

Question

I wonder if there is a clear difference 

Answer 1

get back to somebody(phrasal verb-informal) = to talk to someone or telephone them later in order to answer a question or give them information.

for example: I`ll find out the prices and get back to you.

get back at somebody(Phrasal verb)=to do something to hurt or harm someone who has hurt or harmed you .

for example:He`ll probably go out with her just to get back at me.