Shark Vacuum unable to reconnect after outage

So about 2 weeks ago there was an internet and TV outage in my area where I had no internet tv wifi nothing for about 12 hours. Since then my new shark vacuum robot has not been able to reconnect to my wifi. I have spent hours on the phone with Shark and Xfinity and shark proved to me today that it is not a shark vacuum issue.  They had me connect using my iPhones hotspot and it connected to my vacuum fine. When I called and spoke to Xfinity again, they basically said it shows no problem with my connection or anything and so it’s a Shark problem. Has anyone ever had this happen, and how do I fix it? I just spent a lot of money on this vacuum and for it to not be able to reconnect after an outage after it working fine for about 3 weeks is so frustrating.