Account Health Rating is going down for no reason and no explanation from Amazon

Hi Everyone,

My account health is going down every week and sometimes every day or every other day. Sometimes I even drop 8 points in the couple of days.

It was 424 in March and now 268.

I've contacted Amazon Account Health support several times to address the problem. They are checking the account and telling me that there are no reason for rating to drop. So they reckon it is a technical issue. They are transfering the case to technical team but there is no answer from them either.

Did anyone had this experience before and is there any solutions?

Specially I've got a case from the 28th May and still waiting for Amazon's response. The case status is still 'Pending for Amazon Action'

Thank you in advance :)