Can anyone show the billing interfaces?

Question

PHP

Hi Toaster!
My colleague and I decided to redraw the interface of our billing, which has not changed for about 10 years (only supplemented), into something more usable. Remove a bunch of extra functionality that regular operators don't need. I want something in safe colors with a flat interface with "big" buttons.
Unfortunately I won't show my billing. I would appreciate screenshots and links. Thank you!

Answer 1

So the answer is in the question:
You go to the operators, see how they work, write out unnecessary functionality, redo the functionality, test, redo it again (repeat the required number of times) - hooray, you're done!
Or is it only the visual part that is interesting? It is worth considering that there is nothing to do with convenience, only ruffles.
In this case, any currently popular works on Dribbble and Behance , for example.