Since we are only able to see a small portion of the entrance the only suggestion I have is to paint the wall. The creepers might be a nice addition but I think paint would really make the wall and your plaques stand out.

In high humidity, I suspect fungus but it could easily also be some kind of sucking insect. Try swabbing the plant, especially the underside of the leaves, with methylated spirits. Also spray with fungicide. By the way, don't want to say this, but in the West the word 'swastika' doesn't have good connotations. I know the meaning is totally different in the east, but using that as your avatar name might not encourage people to help.

can some please help me on this... whats its called and other details thanks in advance.... all leads are much appreciated

Hello Mr. Gupta, I hope you are doing well. You have a beautiful space! I can design your garden for you according to your specifications and requirements, you'll just have to implement it i.e. plant the right plants in the right spots, install lights, etc in the right places. Basically a blueprint that you can easily implement. I can also help you choose/buy the right garden accessories,plants and fixtures. If you are interested, please let me know.