2 weeks isn't a very long time, so don't worry.
I recommend the bath tub method too. Get her out of the cage in her ball, take her to the bath tub (no water obv!), put the plug in and get in with her. Let her climb out her ball onto you and explore all over you. Out of my 4, I had two tame pretty much when I got them and two a lot more nervy, and this method has worked with all of them.
Also, I always rub their bedding on me (I stash it in my bra, lol) before I put it in their cages. That way they can smell me constantly and get used to my scent.
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Sam, plus Maggie and Cas.
Pawprints on my heart: Frohike, Langly, Byers, Max, Albert and Charlie