Is LC low contact?
Or do you mean no contact?
Think about the worst case scenario. So say you didn't speak to them, answer door to them, phone, email, messenger, just flat out ignored them for 5 weeks.
What would be the worst thing they could do to you?
Once you've thought about this think whether you can handle that happening to you. You probably can, they probably can't really do anything at all. And if you can handle the worst then you should just make a plan and implement it.
If you mean low contact choose what and when you will engage and outside of this simply ignore, or state your boundaries but don't elaborate, just state 'I won't be answering my phone to you again this week, have a nice week'
I find that making a plan then implementing is easiest, instead of thinking as you go because then your doubts will cause you to abandon what you wanted to do.