VIT University — Need to change registered phone number

Address:	Chikkamagaluru, Karnataka
Website:	eddts.vtu.ac.in

I tried registering on the EDDTS portal received an OTP number and when I was waiting for the password to come I lost my phone. I tried to register again and wanted to change the mobile number but now the site says the University Seat Number (USN) is already registered. Please help me change the registered phone number
My USN is 4AI14CS008