Your Stressing the snake out. You posted this thread on the 19th, 11 days ago, In that time frame you should of only had one offering from the last refusal.
The more you stress,and keep pushing food in the face, the more itll back off. Wait 7 days, Do not Look at it, touch it. Add water when needed and thats it,
Go get a live fuzzy mouse, drop it in at night time and leave it there till the morning.