proplems theme

Hi I have opened a ticket and talked with Mr. Thinesh P,
but I can’t access at the ticket anymore so I can’t complete my answer, if you publish a reference link maybe I could answer again.

The subject is:
Hi I’ve some problems with the theme multi Purchased https://themeforest.net/item/harvard-responsive-multipurpose-theme/15212328
Last week I’ve also contacted the author ticket without having any feedback. We can’t wait, we buy many more themes from you but you have to speed up with the responses especially in case of serious errors. I ask for a refund to purchase a better one.

The details of the problem are:
The author doesn’t answer in the area of comments to our requests (as you can watch), I have display problems in the header and also with the demo installation because an error occurs in php.
It’s for this reason I have hoped in your response as soon as possible.
Best regards