VIT University — Login problem

I cannot login into my vitee account. First i clicked forgot password then it showed me to type my registered email and phone number. After that i got an email from vitee to my registered email about the vitee account password nd user email. Then i type my registered email, password and security pin, then i click submit. Now, instead of logging in it says "sorry, invalid credentials", i thought the website had some problems that day, so i tried to log in the next day but it showed the same thing. I also tried to contact vitee enqiury number but the call ends right away every time. I did not understand the problem. So, please consider the problem and resolve it.