Our attorney for a real-estate transaction in NJ resigned during attorney review, after having prepared amendments to the purchase contract; but before it was signed (he did not do any further work, e.g. order title search, etc.). He resigned because he said he did not have time to deal with our case. He has now charged us $300 for work he did prior to resignation (his original quote was $850 for the entire transaction). We were forced to find a new attorney, which caused us to waste time, and almost lost the transaction, as the sellers needed to sign the contract within three days of when the original attorney resigned. Are we legally required to pay the $300?