Regarding interview test location changes

I applied for Samsung R&D Bangalore interview test, I got interview call but in which my test location is bangalore. But i want to change it to Mumbai.

Hey which college are u from?and also what is your test score?

I am from NIT, Surat. I got interview test call for Samsung R&D Bangalore which is going to held on tomorrow and location for that is Bangalore. I want to change it to Mumbai.