Punjabihindionline.com Low rating resulted in online defamation Internet

I used another tutoring service called verbal planet and gave their tutor a low rating. Her name is Asha Sachdeva. She emailed me and threatened me to change the rating or else I will pay. Her email - "Alright. If that is what you want, I will stop communicating with you. But trust me, you WILL change that rating and I promise you that. I have been extremely nice to you till now, but I know of people who know very very well how to deal with folks like you. You are much younger to me and mind you, you neither have the skills not the ability to judge me, but I STILL apologized to you humbly and promptly and duly refunded your money because it was a mistake from my end, but now you are completely crossing the line and doing things which are completely unnecessary, giving me a rating when you don't even know who I am and what I have done for my students. I still want to give you one last chance to rectify your mistake or else you will not just rectify your mistake, but also pay for it. " So she joined punjabihindionline.com and had their admin unlawfully take my google search picture and attach a derogatory statement about me causing me much grief as she was malicious about my children as well where I never used their services or even heard of this website. If you are not satisfied their tutor asha sachdeva will defame you publically and you will pay as she threatened in her email to me so please beware before you put your trust in these tutors!