tracking number AG125249701CN says it was delivered to processing place in my town but theres only canada post and they dont have it, it says it was dropped off there on a saturday and they dont get mail on weekends. i dont know where to find it

hello im ebay seller and im in guangzhou (not chinese) (dont have company) and i want to ship my products 100g-1kg to international via Epacket and im so confused about the prices and i cant even find the office and where to go and if i print the shipping labels with ebay usps or i dont know ,in china office they would accept it and give me the privilleges or i must sell in china ebay

I am about to start using a supplier through Alibaba.
I want the items sent using Epacket and have the pricelist so I can work out cost per item.
I see there is a handling fee of 19CNY for each parcel plus cost per gram.
Does my supplier need to have an account with Epacket to get better price which they can then pass onto me.
I have asked them the question and they said...
"Actually we dont' have account with E-packet, as we normal ship by express, E-packet we dont use offen, so they dont have discount for you."
Reason I ask is that sellers on Aliexpress can offer very cheap Epacket prices some as low as $1.
So I take it that they are not paying a handling fee per item they send.

How can I save postage costs please?
Thanks