Overheating after thermostat & hose replacement

What is your question?

2008 Land Rover sport v8 no turbo; Overheated and no heat from the heater. I changed the thermostat, top radiator hose stayed cold, i replaced the hose from the thermostat housing to the throttle body, it was swollen and had squeeze clips. Test drove and when I shut the engine off antifreeze came out under the vehicle. I finally pinpointed it to what looks like the gasket on the water pump. I cleaned it up and topped off the coolant and started the sport, it idled and the temp stayed normal but the heater never warmed up. I looked for big leaks and didn’t find any. I shut off the sport and coolant started coming out of where I seen the small leak on the water pump between it and the block. Is it the water pump impeller or the gasket or did I install a bad thermostat??

What makes this problem better or worse?

I haven’t seen better yet.

How long has your 2008 Land Rover Range Rover had this problem?

A few days