filed up my car with Diesel fuel, instead of Unleaded gas

The advice of their Supervisor (MR Luqman ) was that it was ok, because you can just dilute diesel off with regular unleaded and it will be fine. After speaking to him ,I got people who had this similar incident happen, they all say that the gas station would try to brush off the incident and tell you that the diesel gas will dilute if you just fill it up. This is a **** to just get you off their property so you would not have any proof of their mistake. From people who have had this happen, they say within days or sometimes a weeks, your engine will start stalling and there may be many other problems experienced. The manger of the service atation ,advised me to take the car to VW deealer shipm to diagnose the car . Furthermore, I had to get my tank drained the liquid out of my tank 20 liters , you could clearly see a separation where the diesel fuel would drown to the bottom, clearly showing that it does not dilute with the gas.