Petrol Attendent insterting Petrol Instead of "DIESEL" as told!!!!!!

Good day, I trust this mail finds you well. On Sunday evening, 27 August 2017- I visited the BP Garage in Mitchells Plain Morgenster/Swartklip. My partner informed the petrol attendant, Wheelix that he needs to insert R100 Diesel into our Opel Corsa 1.7 TDI bakkie, in which he insterted "PETROL" We only noticed that he was doing the wrong thing half way through. When we stopped him and asked what he was doing? He kept saying that he'll insert diesel over the petrol he threw in. I advised him that he cant do that as this is a diesel bakkie and previously when the above took place at another garage we had to do over the whole motor, injectors ect of the bakkie as it went jerking. I then spoke to a person I believe was in charge on Duty Raymond or Randal something like that whom advised they will now suck out the petrol and re-throw in DIESEL... he advised that if any problems we should come back to the garage. As driving home the bakkie pushed out lots of smoke and now back fires.... I was unable to go back yesterday as I needed to go to work. My partner works with this bakke and was not able to go work with the bakkie yesterday as it drives for a while before kicking out smoke and cuts out.... Can you please contact me? ASAP!!!!!!!!!!!!! #unhappycustomer #workersnotlisteningtoinstructions!!!!!!!!!!