Why did she treat me like this even after I helped her?

i left my job 5 months ago i give my boss a months notice.

then i find out in m search to find a new job that she lied to people who called her to asked about me.

she said i did not leave on good terms & that i was not able to be rehired.

both things hr said were wrong

Updates
+1 y
my question is why would she talk bad about me?
Why did she treat me like this even after I helped her?
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