Hi Saransh, for one of my trips too I did not get any credit but u will definitely get a mail from tripoto addressing the things that u are lacking like the content, pics clarity etc. which is helpful.
U can also write mail to tripoto for any queries.😊
You get credits for each published trips/ photo blogs/ review on basis of your content and more importantly, originality in it. I published a trip recently on Chitkul for which I got 75 credits but prior to that, I had published a review for which I didn't receive any credits at all.