NUMEROUS E-MAILS - NO REPLY! BAD ATTITUDE ON PHON

I was looking for an Afrikaans book for my grand childs christening, but the store only had English. I bought the English book and thought my daughter can exchange it in Pretoria for an Afrikaans book. The slip got lost and I have sent numerous e-mails to request help or a duplicate invoice to exchange the item. The stores in Pretoria also didnt want to exchange the book without a slip. No reply on e-mails, so I phoned them. They dont give duplicate invoices, and every time I asked a question the assistant said I must hold on he must ask his manager. I phoned on my cellphone so I asked the assistant to call me back. Nobody called me and he said I was rude!. Will never buy from Babies R us or Toys R us again, although my money is good enough!