website not functioning- problem with theme

We have a serious issue on an ecommerce blog

I have opened a ticket but there has been no reply for 2 days now.

The main reason we paid for WPUMDEV is for issues such as these .

In the ticket I opened the initial reply was fast and efficeint and I followed the instructions but 2 days have passed.

Please assist us as soon as possible this is urgent. Our client is stressed out.