Engen with bad attitude

the 2nd of February 2015 between the hours 17:00 and 18:00pm i stopped at Engen service station 1 Platinum to fill my vehicle with diesel and check the oil and water.without my knowledge the attendant filled the radiator bottle with soap water. i paid and left for work on my return on the 6th February 2015 close to home the temperature gauge indicated that my vehicle was overheating. i could not understand this as i do not have a leak on my radiator. luckily i was only about 2 km's away from where the overheating started i switched my vehicle off so it could cool down.The following morning i opened the radiator cap and refilled the radiator with water, to my astonishment i saw foam bubbling out of my radiator, this is when i realized what the attendant had done as my water bottle next to my radiator was also full of foam. Monday morning 9th February i emailed Engen Head Office and notified them about the incident and sent them the photo's of the foam. they responded telling me that they will investigate and get back to me within 48 hour.72 hours still no reply. i emailed again and their response was i must wait in line as there are people in front of me. so i must wait what for