Sorry, pea, there is nothing you CAN do as the conversion was not valid. NO Orthodox rabbinic court (in US or in Israel) will entertain your case as you will 1) not be considered a Jew or 2) not be considered a valid candidate for orthodox conversion.
I believe the reason the rabbi was so nonchalant about it is because he knew the conversion (Reform/Conservative) would not be considered valid outside of his own community anyway. It is a rampant problem in the US and it is spreading to Israel. And I am not sure why they mislead people, but I believe the only way to make these rabbis stop is if sincere converts start SUING for DAMAGES (monies paid, financial consequences due to misrepresentation).
I see a time coming when orthodox rabbis put a moratorium on converting non-Jews all together. You can thank your friendly neighborhood Reform/Conservative rabbi for that and the loads of johnny-come-lately's with ulterior motives, including impressing a boyfriend or fiance.
IF your church says you can't come back, then there you have it. Find a new one, if not there is always Islam.
Godboy:
If the covenant was through the Father then Ishmael and Esav would also be included. Why did Avraham make Eliezer swear on his thigh?
I am SO sorry that the KJV does not teach you the difference between the requirement for being born b'nei Israel (through the mother) and the requirement for tribal inheritance (through the father). But if your mother is not Jewish, born as Rivka or converted as Ruth, it does not matter who your father is. Do you deny this is written?
I believe this has been explained to you before.
Your REFUSAL to get it straight will have you soon and hereon deemed 'mentally deficient'.
Edit:
Add ten thumbs down to my answer for me, because it is the truth.
I now see from previous questions that there were emotional 'scars' that probably require greater attention.
I apologize if i stated the truth too harshly, but I am tired of people misrepresenting the Torah and/or degrading it down to lox and bagels, and I am not going to get any nicer about it.
Sukkot chag sameach, all.