Zivame — Store employee

Hi, I visited commercial street Zivame store to buy a tummy tucker
The store employee suggested that the product I was looking for was not available and therefore she will place an order online which will be delivered to my address
She then convinced me to buy another product and she was sure that the size of that product will fit me and placed the order online
She didn't tell me about no exchange policy and kept insisting I online
Now that I received the product, it does not fit me and now the store employee is not responding to my request and is not letting me talk to the store manager