Those circle door grommets are outside of the door seals, so won't be leaking.
As I mentioned it's likely to be the windscreen or the plastic sheet behind the door trims leaking in.
You really need to get the hose pipe on the windscreen area and see if it leaks in, and the passenger door maybe also.
Lay some toilet roll around the inside of the car near the doors to see where it is coming in, the toilet roll will be wet.
The Aircon drain would never create that much water, do you even use the Aircon?
It's not been unknown for Cazoo to supply cars that have had accident damage, so maybe it's been badly repaired, did you do a car vertical check for accident damage before buying?