Management Company

I am new to this discussion board, we are a 81 resident HOA in Northridge CA. Our previous management company since I have lived here (5 yrs) was a non performance company. I became a board member recently after a home owner was attacked by gun point and almost raped in our gated community. We have since moved to a new management co. who completely "sold" us on their performance - we did check their references and now they are really being non-compliant. They do not follow up with us on our requests and I have not been given general ledger information regularly, they are charging us for copy costs which they can't account for, they send bills for things that were not approved by the board, and now they are not returning phone calls. Today I get an email saying we have $7500 outstanding invoices and only $2500 in reserves. Is there a legal service or better business bureau division who can help us?