I find the word 'fired' a bit rough also. Sounds like you've been given some good advice here. Just phone her and say thanks but no thanks and when you ask someone next time to sponsor you, may help to find out a bit about them first, like how they work their program.
When I got sober, there was this woman I always saw at meetings who was beautiful, been sober forever, had her own business, modern car and spoke really well at meetings so I wanted to ask her, because that was I thought life was about - looking good.
These days I thank my lucky stars I never had the courage to ask her because she is IMO pretty sick, emotionally. Very manipulative, cruel, flashy, drama queen etc...
Instead I got a little old lady who lived in a bedsit and told me she never used the 'F' word outside of her own home - she was very old fashion.
We also read the big book together. For me God works through all kinds of people, I just have to be open minded enough to see/hear it.