After a long wait, I finally got the copy of documentation used by the eharmony to prove that I still used the account when I submitted a MC dispute. I took down my pictures and submitted the cancellation request on May 19,2020 and I have never logged in again. Yet, in the documentation provided by eharmony, it showed I still sent email out on May 20,2020. Now, I understand why I read so many reviews mentioned that they couldn't dispute the transactions with the credit card company for eharmony transaction. Because the company can simply login to our account and faked our email out and give impression to credit card issuer that we still use their product. Never deal with this company, I disputed the transaction because the advertised feature in their website was not available in the actual product. Once you signed up, no way you could get your money back and you have to use what ever product they give you. Don't easily trust any functionalities advertised in their website; the actual product might not have it. For example, this one - https://www.eharmony.com/tour/tips/eharmony-religion-settings-the-how-to-manual/; this functionality is not available in the actual product.
You can read several customers' complains about false advertising in BBB website:
https://www.bbb.org/us/ca/los-angeles/profile/online-dating-services/eharmony-inc-*******9297