melissa she's not the only person available to sponsor you. i'd look around at meetings.
i'm confused. why take yourself off home group email list?
no you don't owe her anything. you tried and she's possibly wrong not to at least respond. but she may be away or something and not ignoring you. how long has she been sober? if it's under 5 years sober that could explain her behavior if she's deliberately not responding. it takes about that long in sobriety to really effectively sponsor someone, imho. having done all 12 steps is necessary too.
i'd suggest not shooting yourself in your own foot. like, "i'll show you attitude." the only person who loses is you. we have a tendancy to be all or nothing people until we grow in sobriety. even then it may pop up but we're aware if it happens.
just keep the focus on you and your own sobriety. it seems you are hurt by the lack of response by her. hurt doesn't have to turn to anger. it's a luxury we can't afford.
please let us know the outcome and how you are doing. i was told my sobriety had to come first no matter what. hugs.