I am sorry for your experience in a very difficult time. As you identified I was not in the building when you came to collect his belongings otherwise I would most defiantly have come to offer condolences.
I rang when I was back and I apologise for not being in touch sooner. I apologise for your experience of thinking that I couldn't be bothered. I know that the staff on shift had offered condolences at your sad loss.
I assure you that empathy and compassion are not part of money being made. The human side of care is always keenly felt by anyone who works in this challenging sector. I acknowledged your sad loss at the soonest time I was able. I know the staff in the building offered their condolences at the time.
We all wish you the best for yourself as you deal with your sad loss.