Really sorry to hear that.
I hate it when people generalise, but all farmers are selfish bast@rds.
No other industry would get away with such dangerous negligence on the roads. I've had arguments with farmers and their response is always "What do you expect us to do, clean it up?"
Uh.....yes I do actually. The same as the rest of us have to.
On Monday night I called 101 to report diesel spread over the road at the bottom of Lowden hill.
They took it pretty seriously and said they would send a car to check on it and notify the Highways agency.
The next day they had spread cement dust over it, so action was taken.
Hope you get it sorted.