Replying to Boots

so obviously you guys arent bootfitters, or rather you cant fit boots for me over the internet, but i have a problem, and its painful. when i try to butter my chronics, my heels move around, and i just noticed this. i have some atomic b-series boots. i don have a really wide foot, but it isnt super narrow. also, my ankle is very skinny, and i have fat calves. so i cant really buckle the lower of the 2 upper boot buckles to a good tightness, and i always find that if i do it tight, my calf is like dieing at the end because its too tight at the top. also, when my heels move around, i get to this point above my heel, like near the achilles tendon, where its an extreme pain. when i get my foot flat in the boot, it dont hurt no more. what brands for boots should i be looking at, or should i just get a heat moldable liner?