I'm not sure I follow the OP. So you paid for excess luggage, checked-in and the flight was cancelled. You then rescheduled for a later flight, checked-in again.
I'm not sure if your complaint is that you were charged again for excess luggage? or Did you choose not to use your excess luggage allowance and as a result want a refund?
Edit: Having re-read the posts I think it is the latter. In which case I don't see why you should be refunded. You chose to take less luggage - end of story.
Please re-read post again before you make end any
"of story comments".
Am asking for refund for
overweight excess baggage.
Excess baggage was used and paid for. When I rechecked bags in again after 5 days, bags were not overweight.