1. Always send Assigment Code, Registration number, Error Screen shots while writing mail to complain.pbc@gmail.com
2. It is advised to use free online tool to minimize your file size. Just google it "pdf resize", you will see lots of online tools.
3. To change your mobile number,You need to write to your HOD/COE with your application.
4. At the time of making payment please wait till the payment gateway returns back you to your dashboard automatically. DO NOT Disconnect or page refresh or back while payment is under process. If you do so, the portal will not update your payment status.

5. If you have any payment related issue write mail to complain.pbc@gmail.com ONLY with your candidate id and Registration number. CCAvenue Payment gateway may take up to 48 hrs for update so, you need to wait.

6. If you get success mail from CCAvenue, in most of the cases your payment is okay( in some cases payment get auto-reversed). Do not put unnecessary tension on you.

7. After making the payment, CCAvenue will return to your dashboard . You may get a confirmation message from browser( from http to https and vice-versa). Please click on confirm/submit while backing to your dashboard.