India Post — WES Transcripts stuck in Canada Customs since 11th Feb 2021

My transcript were dispatched from Calcutta University on 1st February, reached Canada customs on 11th February 2021 and has since been stuck there. I have contacted India post and launched a complaint in their portal but the only response received is to contact customs office. But just a few days ago my personally sent documents via DTDC cleared Canada customs in 2 days. Why is it that only India Post's parcels are getting blocked? What kind of service is this? I request India post to take ownership and provide me with more details on why my speed post is still stuck. Tracking number is EW[protected]IN.