how do i get rust out of blonde hair?

I used a perm solution on it . I was very suprised to see how purple the solution turned from the chemical reaction to the rust in my hair. it really took out the rust and returned my hair to it's almost fully natural color. my hair is very fine and i usually don't use perms because of that but i was desperate. so it did damage my hair . it made my hair kind of stretchy when it is wet and it breaks fairly easy when i comb it. I'm sure that someone with thicker hair would have no problem using it. but I am afraid to use another perm solution on it for fear it well really break it . they say that perming your hair changes the hair structure and makes it very porous and will make it absorb the rusty coloring even faster. well.. i believe it because my hair is orange again after only about 5 weeks from using the perm. Is there something else I can try? I have tried the malibu treatments a few times. it helps very little. PLEASE HELP ME!!! I can't stand this rusty, dull, limp hair.