Had undetected inner ear inf. caused insomnia and loss some hearing took several antibiotics to resolve is there a reason this could happen ?

Reason for what?: You have several questions combined into one, and i'm not sure which part you're asking about a "reason" for. If an ear infection causes pain, it will interfere with sleep (resulting in insomnia). Hearing loss can also occur at least temporarily. Some antibiotics can affect hearing long-term. I suggest asking the physician treating you these questions, since s/he knows your case best.