Has to be the most unprofessional legal firm have ...

Has to be the most unprofessional legal firm have ever come across my life. I was constrained to use them for conveyancing a commercial property as they were amongst the only 3 firms on the panel of the mortgage lender. Their charges are 3 times that of any standard conveyancer, they make merry acting on behalf of lender as also client and worse - its been 7 months since the transaction was completed, but the property has still not been registered. they still hold retainer from my side and dont respond for weeks to any queries..no one picks up phones...its a living nightmare..am contemplating action through Ombudsman / Law society..not sure if that will help as well.