Hi all, can anyone advise me with my prob? i am mixed race, but wiv english hair, my mate highlighted my hair?

hi all , can anyone advise me with my prob? i am mixed race with english hairtype, my mate highlighted my hair and its gone so wrong, my hair is brown, but now ive got ginger stripes init , and patches where she aint got to the roots, it looks bad, cant afford to go hairdressers, what can i do x