Key reprogramming ??

[Imwasted]

hello to u all 🙂 

ihav the "systems engine fault" on my focus and after reading a few of ur topics on here decided to buy a pod, i matched the numbers on back so i know its right one....it all unlocks etc with my key , but not start

1, the fault from the previous car appears "steering assist faliure"

2, immobiliser kicks in

i contacted where i got pod for key

he sold it he said .... after reading about counting the flashes of the red light , i counted 15 

which the guide said is incorrect key....

i hav askd numersous mechanics, auto locksmith, friends etc but no one seems to know what i mean or dont do reprogramming 

help please 

who do i need to go too?????

thanku