Unwanted stock delivered

Good day,<br> <br> I ordered stock online as I have an account with them. they then called me to confirm my order. they offered me more items to go with what I ordered but I refused as I would not have any use of the extra items. they delivered my order with the unwanted items I advised I did not want. I then sent them a mail immiadely to advise I wanted to return the stock. I did not get any response. I then phoned to make follow up and was sent from pillar to post. and this I am not happy because I communicated the retunring of the stock within their 14 day return policy. please help resolve this issue because I cannot afford the instalment including the stock I did order.