stinking attitude, stinking service,

i stopped at the garage to fill fuel, and i often go to the same garage, this morning as i want to pay for my fuel, the attendant turns his back to me taking my card, i merely asked him to allow me to see what he is doing as i have had an issue at a gas station previously my card was cloned, he asked me if i have a problem, he thinks theres something wrong with me, i told him i only asked for u to face me, he raised his voice shouting that he is trying to do his job and if i have a problem with him, he was very rude,i even asked to see the manager and he just ignored me, this is terrible service as i am a loyal customer, he was waving his hand in my face and asking me if i have a problem he will sort it out, as i left he laughed and told me i await your call, this is appalling really, very sad for your'll to lose clientele over staff that don't value customers. i now await a reply from u, cos i will be visiting the garage again and i would like to see this man taken to task.