I'm here with the full intention of just bouncing an idea off the void. I have pretty much made up my mind, but I'm willing to listen to an alternate take.

There is a "friend" who I feel uses me as a crutch at his convenience, regardless of what I may be going through at the time. He has asked for money before, with the excuse of his daughter needing x or y things for school. He had paid me back up until this last instance. Its a semi-insignificant amount, but I won't say no to getting my $200 back.
The last time we interacted, he asked me to help him wipe his PC, reinstall windows etc, and I refused for a few weeks as I was extremely busy with work. He bugged me enough that I relented. As I was doing it, his PC took a shit and I was suddenly to blame. As I attempted to fix his bullshit computer, he continued to berate me, blame me and ended up "dismissing" me. I chose to finish getting his computer to boot windows, and left without a care in the world about stability, drivers, or his backup. He stopped his payments and to date still owes me $200. I'm over the money, just stating the facts.

I decided to cut him off and just move on with my life. It's worth noting that him and his wife were a credit card reference, and some banks take it upon themselves to contact your references as "collections messengers". So I fell behind like 10 weeks, and they obviously called them. Shit, they were calling me and my dad about it almost every other day. I never received any money. I eventually got back on my feet, paid off my debt, and carried on business as usual.

Fast forward a year after all of that, and he has started messaging me, asking me to drop by his twitch stream. I've read em, but have not and will not respond. I understand this as him extending an "olive" branch and trying to reconnect. But, then I remember that he owed me money while I was in a slump and he chose to not pay up when I needed the help, and he kicked me out of his house during his PC death. What would you do?