not read it all so might be repeating but
yes- the initial error was yours- but- they HAVE to have systems in place and trained first aiders on site surely- its a fekin petrol station.. should be a pre requisite that the staff know how to deal with spillage and eye contact/skin exposure....
I seriously would call them - e mail them and registered mail them with your concerns and infer further action..
and I always fill my bike up sitting on it- you need to tokeep it level .. !
go the docs.u only get two eyes messie. (oh unless u r male
)