This is a civil dispute and not a criminal matter. I'm changing the practice area to Landlord/Tenant because I think you'll get a better range of responses there.
As to your 2nd question: you can file a complaint about any attorney regardless of your relationship with him/her. There are instructions for this on the Cal Bar website: www.calbar.ca.gov
This is a civil matter, not a criminal one. You have no grounds to complain against your landlord's attorney. The landlord, not the attorney, is in possession of your property. The attorney, or landlord if the check was delivered to the landlord, may wait for the check to clear before allowing you to recover your property.
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