Buy a telescope, look at the other planets of our solar system, and see if you can find one that is not spherical in shape.
You can also fly to either Quito, Ecuador and Nairobi, Kenya (cities on the equator) and you'll see Polaris on the northern horizon. Cape Town, South Africa and Melbourne, Australia are south of the equator. Fly to either and you won't see Polaris at all.
There is also the fact that the force of gravity depends upon the distance between two interacting objects, and the only three-dimensional object you can make with a single distance is a sphere.
There is also the very high probability that no one here is a physicist, cosmologist, or even any type of natural scientist so these discussions are unlikely to be resolved due to the nature of the persons engaging in them.