30 day return policy!

I bought a watch at Sterns In Baywest on the 19th February 2021. The watch wasn’t a great fit so I decided to return the watch on the 30th day which was on the 21st of March. I was then told by the assistant that the 30 day return policy works with calendar dates, basically meaning 19th to 19th however February was a short month and 19 Feb to 19 March would mean that it was only 28 days. She then told us there wasn’t anything she could do and that the system would reject the return. I left the store very unhappy as I felt ******!!