How to stop wasting so much money on food?

Hey, I need help in this topic

I've been addicted to sweets/chips and fizzy drinks since 8 y.o and it's still today with me, at 16 y.o

This is a big problem for me and I just don't know what strategy is the best to fight the addiction. I guess my brain is addicted to them and whenever I have money, I go and spend it, even though I don't want it that much.

I'd say in my "defense", I eat healthy food at home and hit the gym. These sweets are my relaxation from the stress and this is a problem too.

If you encountered this problem or have any sort of tip, I'd appreciate it a lot!