Dodging radar missiles at close range?

So I'm alright at dodging radar missiles, and there aren't that many at my BR of 11.0, but I'm having trouble when people launch them in headons at 3-4km range. It doesn't give me enough time to notch and often I'm too far off the ground to get low enough to dodge it. Chaff is ineffective in a headon so I end up eating all the missiles. Is there a way to dodge them or do I just have to eat them every time?