Edcon ************ service fees + interest charged on my account that was zero balanced 3 months in a row!

A few months back I had cleared the balance on my account and was under the assumption that as my balance was zero, no service fees would be charged on my account (as per the FAQ's on the website below)

Is there a fee for Edgars accounts that have a R0 balance? There is no monthly service fee charged to accounts that have a R0 balance. If you have a scenario where this was charged, please contact us so that we can review the account.

When my next statement arrived, I noticed that I was still being charged the service fee including interest on the service fee. I proceeded to pay this amout of R34-00 thinking that it could have been an oversight by myself and I underpaid the previous month.

In my latest statement however, I found that I am yet again being charged the service fee + interest and proceeded to email Edcon to query. There were 2 responses from what looked like an automated response with a human email signature and in both responses, they eluded to a " Settlement" amount and the onus was on me to request a settlement and only once paid, will my account be a Zero balance. I proceeded to explain to the recipent on the other end and also via the call centre thereafter that your website specifically talks of once your balance is Zero, no service fees are charged on my account and I have now for the 3rd month been charged a service fee + interest for an account with no transactions in the past 6 months or so.

A question that I have is why should I request a settlement amount when my statement provides this information and I have paid the balance on 3 occasions which with basics maths should be zero. Furthermore, the edcon website talks about accounts with a zero balance will not be charged a service fee or interest and if my balance is zero, why am I am being charged a fee every month thereafter? Had I not questioned this unscrupuolus practice by Edcon and regurarly looked at my statements, I surely would have a lwayers summons and a negative credit history due to their accountig practises.