I am unable to download version 10.14.0 from 10.11.6. I need this to run microsoft office

In what sense can you not upgrade to Mojave? Your profile says that you have a retina MacBook Pro which can be no older than mid-2012 so it will support 10.14

Check that you Mac is a supported model. See here.

If it is in the list of supported models use Safari to download the installer from the link on this page under the heading Download macOS using Safari on your Mac. The link will produce the Mojave page in the Mac App Store.

The Age of this computer will Govern what newer version of macOS it will Qualify to install. Use About this Mac from the Apple Icon on Desktop - the required Information will be there.

With the above information in-hand - follow this How to get old versions of macOS and verify what version this computer Qualifies to install. Make sure to use Only Safari to commence the download as Others may not work

Make a Time Machine Backup Before attempting. Notation - Mojave is the Last version to support 32 bit applications / extensions and Drivers. Catalina and Big Sur Only support 64 bit and there is no workaround.

Are there any AntiVirus, Disk Cleaner, Optimizers, Un-installers, etc installed which should be removed as per Developers Instructions. They are useless, unneeded, cause havoc and interfere with the normal operation of the OS and may even Corrupt the OS requiring a Reinstallation

Make sure to use Only Safari

The only version available from Apple site is the most recent version 10.14.6 from How to get old versions of macOS

I am unable to download version 10.14.0 from 10.13.6