You are aware what you are doing is forcing her to do something against her will? If you truly love her you wouldn't treat your ex like your property and demand she returned through a spell. I suggest you reflect on the relationship, figure out if anything went wrong and if you can, try to fix it [say she didn't like you playing video games all the time, try limiting your play time] after a few weeks/months if you feel you still belong together you could ask for a second chance. Perhaps try a candle spell or something just so she softens up to you, but you should rely on yourself, not a spell, because forcing an ex to return through a spell isn't really love.
If this person still says no, as hard as it sounds, accept it and move on. This is another lesson on the road of life. Maybe one day the two of you will get back together, maybe you'll both find something better. Whatever happens accept it, life isn't always happy but it's still worth the ride. Good luck to you whatever you choose.