If I sign a contract to buy and part of it was deleted when the seller signed without sending it back again to me to initial or sign, is it binding?

I signed a contract to buy a home and part of terms included in the contract was deleted after I have signed it,before the seller signed, without them bringing it back to me to sign again. Is the contract binding? The unscrupulous realtor who represented me was my loan officer who qualified me for a conventional loan in my previous contract for another home that failed to close. He promised to help me get a loan and he knows that I have an S corp that is less than a year and that few banks that we approached will not loan me money except I file my first tax return for 2017. He sought for loan for me from two companies and one of them which later denied the loan to me wanted to push to me to take non conventional loan which I refused. The sellers agent is asking me to sign an extension of the contract stating that my earnest money is non refundable. She claims that effort made by the realtor for me to secure a loan does not count and that they' will not give me my earnest money.