1. Getting a half size bigger will not fix the problem. Boot half sizes do not change the shell at all, just the liner (liner doesn't matter whatsoever in fit), and if you are feeling the tingling in your feet an they are uncomfortable, you have the wrong boot. To see if you have the right boot, take out the liner completely, put your foot in the boot, and feel around your foot. When feeling with your fingers always move your foot to the opposite side of the boot as your hand is on. Behind your heel and above your instep you should have about 2 fingers of room between your foot and the shell, and all around the side of your foot should have 1 finger width. If you have less, the shell is your problem.
2. Have the guy working on your boots "Punch" them. This is where they heat up the boot and simply stretch the plastic of the shell. If your foot is just wide, they usually punch the opposite side that it hurts on (usually the inside). If your foot is just fucked and you have a large knob on it or something, they should punch out on the same side as that is.
If they have the ability, make sure they PUNCH the boot rather than grind it. Grinding works, but it takes away from the integrity of the boot far more than punching.
If you have any questions, feel free to PM me.