Extra space appearing below comment box due to min height class

I have installed Comments Evolved for WordPress plugin with Monstroid theme. I have noticed after activating plugin there is extra space appearing below comment box in page https://www.mbaessayconsultant.com/mba_new/essay-writing-tips/mba-application-essay-better-writing-tips-part-1/. After investigating I found that there is a class named r3 having its value min-height:600px. I am unable to modify the css as its fetching from https://apis.google.com/_/scs/apps-static/_/ss/k=oz.comments_widget.-1fok3erstpgwp.L.W.O/am=Ag/d=0/rs=AGLTcCNbYVNejdewVbY5cXFK9FXfTGxYlQ. Request you to provide the solution to fix this issue.