Taking legal action against a Company regarding a subcontracted company

We currently have an issue with a company that outsourced work for our website. The subcontracted company has been dissolved with no notice from either company. We are unable to update or maintain our website now as the subcontracted company was the System Administrator for the website. The parent company says they are unable to take control as they require their "signature" which is impossible to receive. We have an account with the parent company, but they refuse to migrate the website to their company for administration. There only solution was to setup a new domain name, this is unacceptable as all of our equipment and brochures contain the current site. We are losing money each day and advertising wrong prices for our services. Are we able to pursue legal action against the parent company for negligence or for the subcontracting company's actions? What is our way ahead if there is one?