There is alot of conflicting advice. Just find the way that suits you best. You would find with solely pumping that milk would dry up eventually anyway, some people in days, others weeks or a few months.
If you stop cold turkey then there is 2 things you can do. If you get engorged either leave them or just express a tiny bit off to give relief.
Pretty much they are the only things you can do I believe, I'm not 100% sure of that though lol
I think leaving them when engorged is going to diminish the supply alot quicker, so it depends if you are able to bare it do not. Wear breast pads as obviously some milk will leak anyways.
Good luck hun and hope you get on ok xxxxx