It sounds like you may need to move to VPS or Dedicated hosting with root access in order to accomplish what you're trying to do. As you stated, on a shared platform you don't have access to the root permissions. If this is something you need to change, the best option is to get a VPS or Dedi server, that way you have full control of the hosting environment.
This is most likely a change they won't make on a shared hosting platform but you can always give support a call and see if they can help you out.
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