First of all, I want to tell you that I'm sorry that you felt mistreated. Sometimes, doctors are very busy and they might come across that way when really they have a lot on their mind. A good bedside manner really can make a difference though.
In terms of the pressure, applying this judiciously can help some swelling that may be related to the manipulation caused by the procedure. Another word for this is inflammatory edema. It shouldn't really affect the way the fat will be shaped unless a lot of pressure is applied in a forceful way that could affect the fat's survival during the crucial period of about a month after your procedure.
The fat placed really should be formed by the technique of laying the fat into layers and by the amount placed. Each fat cell or group of cells should have their own specific location to acquire their own blood supply. This is the best way to ensure that the fat will survive.
Consulting a Board Certified Facial Plastic Surgeon would be something that I would recommend. We specialize in the face and are highly qualified to help you with this.