If you are experiencing harassment from MCU Holdings or any other debt collector, there are steps you can take to address the situation:

1. Understand your rights: Under the Fair Debt Collection Practices Act (FDCPA), debt collectors are prohibited from engaging in harassment, abuse, or other unfair practices when attempting to collect a debt. Make sure you know your rights as a consumer.

2. Keep records: Keep detailed records of any communications you have with the debt collector, including phone calls, emails, and letters. Note the date, time, and content of each interaction.

3. Contact the debt collector: If you feel comfortable doing so, you can try contacting the debt collector directly and informing them that their behavior is harassing or abusive. Be clear and firm in your communication, and keep a record of the conversation.

4. File a complaint: You can file a complaint with the Consumer Financial Protection Bureau (CFPB) or your state's attorney general's office if you believe the debt collector is engaging in illegal or unethical practices. Provide any evidence or documentation that you have.

5. Seek legal advice: If you are being harassed by a debt collector, you may want to consider seeking legal advice from a consumer MCU Holdings Harassment protection attorney. They can advise you on your rights and options for dealing with the situation.

Remember, you have the right to be treated fairly and with respect, and debt collectors are required to follow the law when attempting to collect a debt. Don't hesitate to take action if you feel that your rights are being violated.