I really need your Advise, Please.

I received an incident report because I recorded conversation with an HR. My only intention is a documentation i can keep for myself because HR people always belie my claims And nothing happens with my complains. They did those Not once but many times already. I was not thinking about breaking rules. Its just something I can use when they Would tell me again that any of my claims were not talked about. Now, im at risk of losing my Job as they deemed it as terminable offense. My action is truly unintentional like didnot mean to frame people in a legal battle. I just wanted a documentation. Please help me. What should I do and what should i write in my response. Please I need your legal advise.

recording a conversation without the consent of the other party is against the law. magmakaawa ka na lang sa management at magdasal na maging lenient sila.