No accountability/No one willing to assist

My name is Virginia Motaung and I must say I am very disappointed with the service I got from Homechoice to say the least, I ordered a Mila 2pc Pedal Bin set parcel no: PFS ********** 1 which I received together with parcel no: PFS ********** 5 which I did not order, when I call your call centre to ask what's going I am told to send this back to the Post Office. How am I sending this back to the Post Office? On who's account will the Post Office charge for this? Why is it that Homechoice doesn't want to take accountability for this error and meet me halfway in rectifying it? I am not sending this back to the Post Office and I will not be charged for items I did not order, this is against the law and against the consumer act. Can I get someone who is willing and understands customer service to call me and arrange for these items to be collected from the very same address they were delivered. I am an old lady I am not walking in the sun to the post office I am sorry, if this is a problem please let me know so we can escalate this further.