Pathetic service

Good day Im really very upset & dissapointed with there service. I think i should take it up further as this is just not on. I placed my order on the 26/08/2018 i received the incorrect order on the 29/08/2018 & i phoned in that same day to report it. Today is 13 days and still no help. I have a school function for my daughter this weekend and i need a shoe, im a single mum and i dont have so much money to buy another shoe. What am i suppose to do now? I dont have the shoe or the money! I cannot pay and keep something i cannot use .