Don't tell me I'm slow.

I was helping this person on the help desk. The following list of response times are important.
His first post: Posted on: 21 April 2013 12:58 PM
Me: Posted on: 21 April 2013 01:25 PM
Him: Posted on: 21 April 2013 01:28 PM
Me: Posted on: 21 April 2013 02:00 PM
Him: Posted on: 21 April 2013 02:07 PM
Him: Posted on: 21 April 2013 02:14 PM
Me: Posted on: 21 April 2013 02:25 PM
Him: Posted on: 21 April 2013 02:28 PM
Me: Posted on: 21 April 2013 02:42 PM
Him: Posted on: 21 April 2013 02:47 PM
Him: Posted on: 21 April 2013 02:48 PM
Me: Posted on: 21 April 2013 11:47 PM

I closed his ticket after 48 hours of inactivity. He then sent this reply:
Survey comment posted on: 23 April 2013 01:46 PM
Slow replys.


He opened a new ticket, which I have since been helping him on. This is the time stamping of our progress:
Him: Posted on: 23 April 2013 01:31 PM
Me: Posted on: 23 April 2013 04:03 PM
Him: Posted on: 25 April 2013 01:56 PM
Me: Posted on: 25 April 2013 06:10 PM
Him: Posted on: 26 April 2013 02:05 PM
Me: Posted on: 26 April 2013 11:51 PM
Him: Posted on: 27 April 2013 07:03 AM
Me: Posted on: 27 April 2013 12:41 PM


This was what I added at the end of my most recent response:
Also, I believe now is the best time for me to address your survey response.

I do this voluntarily. I am not paid. I do not have to do this. I do not sit at my computer waiting to answer support tickets. I have a full time job as a nurse, I am an Engineer in the Army Reserve, I have a family to take care of and medical issues to tend to. I also enjoy the opportunity to relax and sleep when I'm able to. If my responses are too slow for you, then you can learn how to fix your issue yourself.
Your last ticket was closed because YOU were non-responsive after 48 hours. You then responded to the survey stating that my voluntary help was too slow.