How can I protect myself from allegations?

I worked with a company from November 2023 to May 2024 as a full-timer and then as a freelancer. Salary payments were consistently delayed and paid in installments. Despite multiple assurances, the employer failed to pay on time, providing various excuses and forcing me to visit the office to address the issue. During my visit, I spoke firmly but did not behave aggressively. I also contacted the MD's wife, who is the CEO, when my calls to him went unanswered. The employer has since alleged that I created a disturbance, damaged their reputation, and threatened to take actions such as filing harassment or misconduct claims, claiming defamation for alleged harm to their reputation, accusing me of unprofessional behavior for contacting the MD's wife, and alleging violence or threats during the office visit. Please advise on how I can protect myself from these allegations, handle the situation professionally, and ensure closure once payment is cleared.