Please I need an adivce, I submitted my SINP application on 23rd December 2018, on 25th of March, PIU sent me procedural Fairless letter, stating that, I paid my application fee with someone that is not a member of my family and also I received a professional help while filling my application but was not stated, and they gave me 10 days to explain my self, which I did, after that, in April they asked me to clarify my children names in my application that it does not match with my profile name, which I did, in the same April, I was ask to provide information on agent I contacted early last year but I couldn't hire him due to price, and the told me that the will make decisions on my case after 28 of April, which I replied to them as they requested, since this May my invoice is no longer seen in my profile. And I have not hear anything from them again, my application status is still showing in process. Should I mail them and inquire?