What would be a good discipline

My 11 year CANNOT stop stealing. Either at stores or if I give her money she will steal more out of my purse. I let her go for a bike ride the day after I bought her a new bike and she comes home with this little arcade dealy-o and it's obvious it costs more than 4 bucks which she had on her. I could tell right away she was lying, and I had to say okay let's get in the car and go ask the store and she broke down and told me. I took away her games and TV and she's grounded to her room for the week but it just doesn't phase her. Her dad is a thief and steals on the regular but I've cut him out she uses him as a reason as to why she steals. What should I do? I wanted to take her to see a therapist but she just screams whenever I say the word. I'm all alone and I had her young so I believe she thinks of me more as a friend and doesn't respect me as a mother and it's disheartening