How to make my ex to stop contacting me?

My anxiously attached ex keeps contacting me, even though I’ve blocked them everywhere and gave them closure. I explained why I dumped them. Now they’re resorting to long, emotional emails filled with their thoughts and feelings.

I’ve ignored everything and made my boundaries crystal clear, but they just don’t get the hint. At this point, it feels like they’re stuck in a loop of needing attention or validation, and I’m tired of being dragged into it. I block, they come with a new email.

Any tips on how to handle someone like this? Or is ignoring them and hoping they eventually stop the only option?