Shot order

I place an order for the 21 piece Kayley bedding set. I only received 4 items from that order. As I did a follow up as to what happened,the consultant I spoke to said that she will phone me back after she has found out as to why the order wasincomplete and she never called. I phoned again after a few days and I spoke to someone else and she asked me to go to the police station to make an affidavit and fax it. I did. After a few days again I phoned and they said they did not receive it and gave me an email where I can email and also did. I then started receiving calls from their finance dprtmny telling me that my account is overdue. I phone again to enquire on the progress and they told me to go post the order back to homechoice and I did, the post office told me that they cannot accept it as it was over 30kg. I phoned again and they said the will arrange for courier to pick it up and I'm still waiting. They are abusing me on the phone requesting a payment and now I have unnecessary stress. Please help.