Hi Sandeep,

I understand that you are facing a discrepancy while receiving the permanent MMC certificate which you have not yet received but your friends have already received due to the fact that you had some payment related issues at the time of receiving and so to answer your question you need to urgently and address this matter to the competent authority through post while clearly mentioning the details of your candidature and the payment details that you made for the same and also let them know of the discrepancy that you are facing properly and also request them for solution at the earliest so that you have receive the MMC certificate as soon as possible.

Best wishes!