Had my 2017 Pajero serviced by these guys, they fitted me in straight away and it was just an oil change and filter -…

Had my 2017 Pajero serviced by these guys, they fitted me in straight away and it was just an oil change and filter - 70000km. The price quoted was $270, they rang up to say it needed “special oil” and it end up costing $420 . I paid that as I was returning to SA , next day I returned with an oil leak (sump plug washer which was supposed to be replaced) and now I am back in SA it still leaks oil...arrghh. Will have to take it to my mechanic to get rectified, it was JUST an oil change.