Upset and very unhappy

Good day ,I got a call from an homechoice agent and they offered me 3duvets sets and the monthly installments is R150 everything included,after delivery I saw it was duvet covers and not duvets so Ive emailed them several times but to no availability,when I send an sms return,they quickly call me and the lady who called me was rude and said I have to take it and pay for it because 14 days is over ,the more I try to exsplain the more aggressive she became ,the duvets covers is still in its rightful bag unopened and I told her I don't want it because it's not the items they exsplain ed it to be,and the installment reminder wasent R150 as per discussion but now R165 ,I'm really upset and shocked by this service they remind me whole month