Beyond petroleum

I stopped at bp garage coz I needed engine oil for my car, firstly there was no parking. I saw a petrol attendant and asked him if I could get a pint of oil and how much does it go for. He told me to go to the window and ask for myself. I asked him how many types of oil he had so I could take one that suited me, he was so rude and I told him that I was going to complain and write a review about the terrible service. I hope that the owners get this and make changes to their staff and also their customer service