Train your call centre staff properly!!!

I purchased from Home choice 2 years ago, with my account paid up, they still billed me for like R3- R5 after i had made a settlement payment, i have been trying to get them to remove this off my account as it still appears on my ITC as outstanding, i have had no luck in getting assistance.

i still get calls from there sales to purchase more items, this morning a lady calls me telling me about items available for me to purchase so i kindly say "No MY DEAR thank you i will not like to buy anything today" her response is "Why dont you buy on the account anymore" so i explain to her who would want to when there customer services is so ridiculous, i have been waiting on this query for so long, she then tells me " if you need to pay you need to pay" firstly who even speaks in that matter? and secondly she does not even understand the circumstance around it but has the audacity to tell me this? i then tell her you donot know what is going on but you saying that, before i could even finish my last word she puts the phone down!!!! i am so utterly horrified by this behaviour, You call me to sell me your product when i am not interested you are rude? is this how staff is trained to deal with there customer stakeholders?I will never advise anyone to do business with this company.