If they cared they would have voted. Not voting is a choice too.
Really?
In Canada they often had a ban on televising election results until after polls closed. Why? You don't want someone changing their vote because of how the polls are going.
You know, you want them to vote based on their own beliefs, not who is going to win.
That idea makes sense in true proportional representation system, but in a first-past-the-post system then strategic-voting becomes important (as voting-for-beliefs is an immediately suboptimal strategy), and therefore if voters know who is currently in the lead and alter their voting behaviour then surely that's a good thing for democracy?
The assumption that you can manage to fit voting into your life comes from a place of privilege that some people lack. Punishing them harder until they behave more responsibly fixes nothing.
EDIT: It appears the UK has some problems too [1], and being Australian where voting is a legal requirement, easy to enroll and difficult to drop off the register, my perspective is perhaps a bit harsh.
[1] https://www.theguardian.com/public-leaders-network/2015/feb/...
I'm sorry to hear of your situation, but I hardly think it's relevant to the discussion.