Contaminated Fuel

I bought ULP 93 at the Total in Hatfield Avenue,Germiston by the SANRAL building. (Albemarle service Station)I used it in my brand new lawnmower that i have used about 500ml petrol from Engen. The moment i put Total ULP 93 in, my lawnmower started smoking and missfirring. I spoke to a Thando at Total Energy SA and he was very rude and asked if i had the fuel tested before making these allegations. It is not the 1st time we hade issues with this garage.