Miss Z Pointed Toe Slingback Pump (Women)

I purchased these shoes and loved them. I did have to size up about two sizes up but they fit well and were comfortable. When I went to wear them I noticed there was a sticky scuff like a glue or substance was on the top of the shoe. When I went to return them, the first sales person I encountered was very helpful and tried to clean them to no avail. He was unable to order me a replacement pair because there were no more in stock in my size. His manager then came and was horrible. She treated me like I stole them and offered no help for the damaged shoes. I would like to purchase these again but I worry it will be the same scuffed pair and I am kind of disenchanted with the poor customer service I received.