CAN SOMEONE PLEASE FIX MY ACCOUNT

i ordered Luggage in October 2015. the one item was a expedition trolley bag, which as it states on the website, if you buy anything online you can get the bag for R39. i purchased 4 of these bags as i also purchased the Horizon luggage set. i saw on my account that for those items the amount due is R869.01. which is not true as the amount for the trolley bags is R159.06 and the Horizon set is R232.77, which gives me a total of R391.83,,,so where does the R869.01 come from??? and i have phoned in about it two times actually. the first time the consultant was clueless, the second time the lady i spoke to understood me. she gave me the amount of R391.83 which i need to pay for the luggage sets. now today another consultant phones me stating i need to pay R1200 this month.....i did not even argue with her as i already phoned Homechoice as there is clearly a mistake on my account or someone wants to make more money. Someone better sort this out and fix my monthly instalment for this order for luggage,,