L= { a, a.$\epsilon$.$\epsilon$.a, a.$\epsilon$.$\epsilon$.a.$\epsilon$.$\epsilon$.a, ……}={a,aa,aaa,….}
a.$\epsilon$=$\epsilon$.a=a. here $\epsilon$ is empty string(“”).
The complement of a NFA doesn't give us the complement of the language it is accepting. Better you find out the language it is accepting and then complement the language.
I think this is the most important part which is being ignored.