Modise said she was not the only family member made to wait as her other brother also had to wait at the same facility, only to be allowed in when Ben had died.
"He said had he been allowed to walk in 30 minutes earlier, he may have been able to bid goodbye to his little brother," said the grieving Modise.
"This is what makes me angry, that I asked one nurse about the drip and now I am accused of harassing them.
"I also don't think we should shut up because in the ANC we have been preaching about how people must have access to quality healthcare. If we keep quiet because we are black and these things happen in black hospitals we are not doing ourselves a favour.
"My brother is gone but there are other patients who will still go through this."
Modise described her family as "very simple people" who use public facilities "including public schools and hospitals".
"My brother was a businessman, and I'm sure he was able to go to a private hospital, but as the Modises in the North West, we are simple people, we use public facilities."
Nurses' union Denosa provincial chairperson Motlalepula Maikepa declined to comment on the matter, saying the issue was still under investigation.
But Maikepa said the hospital staff was not on strike and that they merely had "a morning gathering" on Thursday and went to work after lunch.
North West health department spokesperson Tebogo Lekgethwane said they haven't decided on an investigation yet but confirmed that Denosa would meet with Sambatha tomorrow.