disappointed by WesBank and unhappy customer

this is what happened to me, I bought a car and the dealership got my finance through webank that was in June everything was well and I asked the car dealer to have a stop order from work for my car to be safe. they told me will have to talk to the bank and was given the number to call. all this happened in June 2018. at the dealership they said I have to sign the debit order and will later change with Wes bank which I did. and I called WesBank same month June that can I please get their banking details from their letterhead because I want to do stop order from my work to their Bank and my employer need an account with letterhead. and I asked them once the stop order is done can they please cancel debit order. I gave the letter to my employer and the stop order was effected for July when I start paying my first instalment and it went to their bank successfully, but the came to my bank and debited same amount, I thought maybe its a mistake I went back to reverse the amount so that my debit orders cant bounce back.

I then went to my employer to give me proof of payments and effectiveness of the stop order and I have sent to them, also my pay sleep to show that the car and house come out as stop order. August the debited again I went back to reverse and send them another proof, and later stage one of their member called me that they saw that there was a mistake of taking the money twice and apologised promised that they will rectify the mistake, and I honestly told them that the reason I want that to be a stop order I want my car and house to be safe, since accounts are being hacked. and every time they take the money and before I can reverse it my debit orders are bounce already and my name becomes negatively affected and I pay lots of admin for journals.

I wrote to them again and giving them my salary advices showing them that the amount is out from my salary to their bank, but to this date is still happening. 5 months down the line.

im still saying even now I want my car come out of my salary as a stop order since my amount is not going to change nor fluctuate any time soon, cause I made sure I pay same amount until I finish paying for my car. I thought this will make them happy that at least one client make sure their amounts are paid accordingly and on time, I have never missed any payment from July to date. I am very disappointed not that the made my name to be negatively affected I cant even change them because im very unhappy at the moment, what pains me is that they see every moth from their reconciliation that I don owe anything.