Repetition strenghtens your belief. Try to type a minimum of twenty times per sitting. It is better if you can have two or more sittings per day initially and have a sitting before you go to sleep. Meanwhile start observing changes in you, they are indicators of success and a little success will help strengthen your new belief enormously.
If you feel there is very little change even after repeated typing, reframe the sentence. Or better, start over from the beginning and define your goals again. See where you could have made a mistake. Always use positive statements and words you are comfortable with.
Note: For issues like phobias, susbstance abuse, manic depression, excessive overweight, anorexia, etc. see ‘Problems that can be solved using Autosuggestion‘.