Thanks for the question and sorry to hear about your Drupal site issues. I can't find your hosting information based on your support center login, so I wasn't really able to determine the exact issue. However, in order for you to change your Apache configuration, you would need to have root access. Review the root access FAQ, then either call/chat/email our live technical support team to obtain the email to request Root access (if you don't already have it).
You can then use Easy Apache by logging into the Web Host Manager for your VPS in order make changes - check our article on using Easy Apache to upgrade your installation.
I hope this helps to answer your question! Please let us know if you need any further assistance. You can find the contact information for our live Technical Support team at the bottom of this page.
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