If you're having trouble with interdictions that you can't beat by any of the following methods:
- use SCO boosts and varied approach angles to avoid the NPC establishing a tether at all [1]
- beat the interdiction mini-game to leave the NPC dropped in normal space where they can't bother you
- kill the NPC for having the temerity to attack you
- as a last resort, dump some of your cargo to distract them while you run
Don't forget the old, "emergency drop from SC when you see a pirate threatening you in the chat" trick. Sure you might take some damage but it does shake them off! Of course if you can zero throttle and get down slow enough you won't even take any damage. I suspect we dealing with a "fly in straight line directly to the station" problem here though, that will cause some angst for players not used to hauling goods!