wrong text book recieved

Ref number:G***, I have been quoted according to my request, however Van shaik sent me the wrong text book, I asked for App**** mechanic's for engineering and it is reflected on the receipt but I received a advanced book in mathematics instead, I am really ****ed, I payed waited a week long and now I am in trouble because my assignment is due next Friday, <br> I am not happy with this unprofessional service. And I am still waiting for another book, let's do this may your poeple come and collect all the books and refund me immediate