Need help with delivering Alex's cargo to Achilles station mission

[reddevil]

I am in the early part of the game. Alex gave me a mission to deliver a cargo

to Achilles station in the Achilles system.

After receiving that mission, once I leave the Aurora system,

wherever I go, the moment I arrive other systems through portals, I am attacked by multiple pirates.

The pirates are waiting at the portals and just attack me with no questions

asked. My mothership is destroyed within 2 seconds so there is no time to run.

I can't not proceed in the game and stuck with the Alex's mission

Anybody has solutions for this ?