Bad service

I bought 2 isomil formula to my suprise when the delivery guys delivered my parcel the parcel had two stickers. The delivery guys made me sign the box after signing he said the box had two stickers and then he opened the box which inside it had phone cable. He took back the box with him. I called takealot and advised that they refund me as i have already bought the formula somewhere. I have been calling them everyday and every consultant give me different story. It is almost a week and they are not resolving my queries but giving me different information.