Hey Govind

If this decision is your then you must go with your decision. If you are not interested in continuing in commerce the surely you should change and it's a big decision to repeat 1year and if you are ready the move on .

You must always choose that subject in which you are interested because if you will show interest in that particular subject then there will more chances to Excell in that field so you must choose that path which you can follow , so good decision move on.

All the best