Rude head's up and last minute M&A co-op offer rescinded, is this common in PE?

So I landed a co-op role in Toronto for a US-based small MM firm. I was ranked '1' by them on my uni's co-op portal after the interview, which means I was their top candidate and they offered me the job.  After accepting the job on the portal, I was met with complete silence on their end. I decided to still book tickets to Toronto (I am an international student and wanted to avoid the Fall price hike) and tried to get in touch with the people in the company as to what type of role it was: in-person, hybrid, or remote? I was ghosted for weeks, and I got a reply last weekend from someone saying they probably won't be going ahead with this since an employee in Toronto left the firm. They told me someone else was leading the Toronto side of things and to get in touch with them. I was still met with silence. 
I decided to contact the CEO yesterday, explaining the problem I was facing since the job was set to begin in the first week of September, and I did not even have the office's location. 
I recieved a swift response this time saying 
"Sorry- not a fit. Best of luck."
"There's your answer."

This seemed really weird since I was their best fit a couple of weeks ago! 2 hours later, I recieved an email from the company stating that they had structural issues regarding reimbursing the co-op students, so they had to terminate the internship. 

Another student from my university who was supposed to be working with them in this fall contacted me regarding the email stating how they had reached out to him last week saying, everything's fine, no need to worry.

I am truly perplexed as to what I should do regarding this. Some of my friends are advising me to make a post about this on LinkedIn and mention that I am open to work for Fall, but I feel like this might seem like airing out dirty laundry against the company and the CEO.