If a debt-resolution firm fails to file paperwork, resulting in xtra fees, do I have a malpractice case against them?

A debt resolution firm (CLG) was hired to manage my debt. They recommended that I destroy my credit and not pay the fees until a summons against me from a plaintiff collector appears. In the meantime, they charge $400/month for over two years, resulting in me paying them about 13K. I'm finally served papers for summons. According to the agreement, I am to scan/upload any and every paperwork received to them so that they can handle it for me. I promptly upload my served papers to them, hoping they file the appropriate paperwork. They did not. In fact, when my wife called, the clerk admitted to her (and later, to me, via phone) that the attorney in charge of my case left the company, and no one took over their case load, resulting in them NOT filing any kind of form when the summons paperwork appeared. Now I have a Default Judgment for the plaintiff, a debt-collections law firm. While CLG apologized, the only thing they're offering is a refund. They will not disclose the following factors, however: -when that refund would get issued -how much of an amount would get issued Do I qualify for a Malpractice case?