Kolkata Sorting Office Complaints & Reviews

I ordered a product which is stuck in kolkata sorting office since 2nd apr. I don't know where to make complaint or contact them. I ordered this product on 23rd of mar and was shipped from there on 24th. Despite of several research i was unable to find their contact information. It has been a month and i didn't received the update. Kindly assist...
Way bill # rv[protected]cn
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RM[protected]CN This is my tracking number i have order a pair of shoes from Ali expressed it's been 5 days there's no updated on this please check last update was it has reached kolkata sorting office...

My order is stuck in the sorting office for about 50 days now... The order is from aliexpress and contains a pair of shoes...the shipment is through china post and the order is received by the sorting office China, BEIJING, Send item abroad (EDI-received), Air, KOLKATA AIRPORT SORTING OFFICE [protected]:01 China, BEIJING, Send item abroad (EDI-received), Air, KOLKATA AIRPORT SORTING OFFICE [protected]:10 China, BEIJING, Insert...