Transfer OPENCART website from one Hosting company to a New hosting company

General information for the website: THE SITE IS ALREADY DESIGNED BUT NEEDS TO BE MOVED TO A DIFFERENT HOSTING COMPANY

Description of every page/module: I have an opencart website with customised design and features and back office plugins hosted with one company.

I wish to move the site to another hosting company so that the design and functionality and everything will remain the same.

So to MOVE hosted file from HOSTING COMPANY A to HOSTING COMPANY B

The domain new name is hosted is with company C

The content and functions in front and back end must remain the same.
Description of requirements/features: When replying please make sure that it will function the same with no difference.

Also important to let me know how long to complete this task.

Thanks.

Any questions please ask.