Incorrect fuel

I filled my car up at BP Cartcath Road KingWilliams Town with 95 Unleaded and on my way to East London the car lost power and started jerking when driving it. I went back to the garage and promised me they assisted me the following morning. I had to go back and request assistance again later in the afternoon when this attendant came with his machenic. after a process of elimination i discovered the same problem so there was still diesel in the fuel tank. I phoned the Petrol Station and they took down my details. Told them I had to tow my car to Pe hoping to get some help. No one has came back to me