Unable to edit / remove shared Calendar reminders on my iPhone

Reminder was created and added to my shopping list by someone I share lists and calendars with 

I moved this to their shopping list because that was the only reminder list I have access to. 

I’m assuming they then moved the reminder from this list or a reminder list I don’t have access too. 

At this point I’ve lost any access to it but it’s still linked to me and showing in my scheduled reminders calender. I can not edit or delete this from my phone. 

They have deleted the reminder from their list and deleted reminders and now I can’t get remove this reminder from my phone showing on my calendar and Lock Screen. I can’t dismiss or mark as done either. 

deleted both apps and reinstalled and updated iOS and this is still in my calender

[Re-Titled by Moderator]