Claim Gone Wrong, Comes Back to Haunt Me

Not business proficient, my bad, once bitten, I understand better now. A resurgence of a claim gone bad has resurfaced after waiting 5 months for an outcome. A few months later. I have disassociated myself from the organization only to find out administrative lapses have resulted in additional costs to my business to date. An opinion is subjective, the facts are turnaround times are beyond poor, service is beyond sub-par and business is suffering. I just want to get on with life, neverminded the loss to company