**Neither a teacher nor a native speaker.**
Hello Zoe2008,
I'm not sure if I have understood the sense, that's why I only tried to focus on grammar.
I am still waiting for the forwarder confirmation as:?: the shipment date is end of June, which should not be advised at:?: early. Please be patient!
Are you sure as is correct here?
At early confuses me as well.
Cheers!