Aldo Flats

I bought this beautiful Aldo flat yesterday. The seller convinced me that I would fit in 8.5 size because it's the only largest they have. I am size 9 and it was a big mistake. This shoe is day old and I refuse to wear it ever again. It was so painful. Also it doesn't stretch ! Ladies if anyone 8.5 size /does not have wide feet this is for you. Take it away from me please!