Multi curved wall problem

I have a long multi curved wall to draw and cannot seen to get it right.
I have attached a couple of pictures of the wall in question together with the .Skp file

Any help would be appreciatedBecome-Recruitment-A.skp (417.4 KB)

Hope someone can help :grinning:

Many thanks

Draw the various 3d curves that delineate the edges of the surface and perhaps even parts of its cross-section…
Then use a Plugin on them - like Fredo’s CurviLoft or even my ExtrudeEdgesByRails tool…