can i get my credit score up quickly?

[mrmrsflweb]

i've been working with a mortgage broker who has strung my husband and me along with changing rates and even the kind of loan we could get...conforming vs. level 2. there were some charge off issues that were not taken care of, but have since been taken care of. because this mortgage broker wants to close this loan quickly, stopped working on clearing up my credit report, because of a number of reasons, and only got a level 2 rate for our new home loan. can i go to another broker real quick and have them clear these charge offs off my report. initially, our credit score was 595, since some of the items were addressed, the score is now up to 627. i know if the charge offs were addressed, because of either error or because of us paying them off, our score would be higher if we had a mortgage broker working on our behalf?.....could you please tell me what avenue i could pursue so that i can clean up my credit the rest of the way.
thanks,
mrs. fl web