In the official website of Sri Venkateshwara College there are no specifics about the changing of course you have applied. So your problem can only be resolved or be guided properly by the authorities only.

As you have cleared the cut-off of what you want to studies , there is a chance that the college administration may give you a opportunity .

So it will be wise if you can contact with the college authorities via email or the contact details present in the website. You will get a clear cut idea about if they will give you a provision or not and according to that take your next step wisely.

I will say it will be better if you contact the college authority calling in the phone number available in the website (in the administration section of the website).

You should speak politely and with respect BY CALLING THEM SIR!

I hope my answer helps. This is one of the solutions you can opt for solving your issue. Have a great day!