Add??? It doesn’t work! – Tiny Month - Easy Calendar Review

Have a massive problem with this calendar after getting it. I have a new iPhone 8 about 4 months old but the add button doesn’t work. I am unable to add new entries or add new calendars. Essentially it is useless. All the other reviews talk about how good it is so can you please fix this problem so it is useable? I would greatly appreciate it especially since this costed money. Once it is fixed I’ll give a five star. Since you ate my money I think you guys should be morally obligated to fix these issues. To be honest, I’m am more the slightly ticked off.
Review by ZBubble98 on Tiny Month - Easy Calendar.