Frustrated with the service at edgars

First time experience with Edgar's, highly disappointed with their customer service. I did a payment on the 2 November due to work commitments payment was a day late, The cashier in Cna Gateway initially gave me the wrong installment, which led to me paying R375, 00 short. I didn't have my statement at the time and assumed she gave me the correct amount. On the 7 November I get a call from the debt collector company on behalf of Edgar's. They start calling me from 6.30am..So I told them I will do a payment on Saturday at Gateway. On the 9th November I did a payment of R400 at Edgar's Gateway.. Monday 11th November I am constantly harassed by the debt collector company for the short payment details, so I asked for an email address to forward the receipt. Initially I was told there is no email to send the details, amazed that the amount didn't reflect, they kept calling me and telling me my account is in arrears. This continued through the week until I called the Edgar's customer care helpline. Only to be told the amount of R400 does not reflect, and since nobody could help me I was told to go back to Edgar's Gateway and they would sort it out. So on Friday 15 November I went to Gateway only to be told they have been offline from 9 November and had no idea that they were offline. Totally disturbed that this whole situation with the store will affect my credit rating. I told the store manager (Monika) I am highly upset with all the trouble due to a stupid mistake by the store, anyway they say they have been trading as normal but are still not making customers aware of the problem they are facing. Monika still hasn't got back to me as discussed. Very disappointing service after being a customer for over 10 years. Account will be closed as soon as possible.