Reverse STO

HI Experts,

I have a situation where, we have executed the Stock transfer order from 1100 plant (1100 is a excisable Plant in Haryana)

to 1400 plant (1400 is NON excisable plant in Delhi). Now during the transit the material got damaged.

Now it is almost 15 days, goods got damaged can you please Guide me , as

1. How i will reverse / Return the STO.

2. Client does not want to cancel the Excise Invoice

3. How i will i claim back my Excise Duty which i have already paid .

Plz Suggest

Regards