my door will not let me in the car what to do

do you have a keyless entry? if so try to hold down the lock button for 10 secconds and then hit the unlock twice. if that doesn't work try to unlock your doors with your key both driver and passenger if neither doors will let you turn the key try applying heat and or penetrating fluid to the key holes ( heat first if your going to do both) also watch your paint with penetrating fluids they will eat your paint