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@thecycleclcinic
Does the nds cup come out. It should do with plus gas and effort. Of the cups disintergrate through corrosion it wontm and then just knock the bb through.
For the damaged cup i would get a 6 pin tool made up a bit like the royce or mavic bb tool and drill 6 holes in the cup and remove.
Its either that or drill the alloy cups to the point the bb can be hammered out. The remaining cup can be removed with caustic soda.
It will come out.
Heat can work too. Used thar before spent 5 hours once getting a bb out of a cheap alloy hybrid. I started so i will finish i kept telling myself.