Horrible od cow.
They generally are though aren't they?
OK,my two tricks are writing a long calm detailed letter of complaint.
Write it,put it aside,edit it,ask someone else to edit it and when satisfied send it. Make sure it is written in good English,well laid out and so on. You'd be amazed at how few people do this and what a difference it makes.
I'll edit it for you if you like! (Spend an inordinate amount of time writing vengeful missives!)
Secondly,next time you're in and she is rude,say loudly and clearly (and quite politely)
'Are you always this rude to everyone or is it just me??'
It will mortify her (and have everyone else sniggering into the dog earred copies of Take a Break circa 1981) and it is such a brill trick question because if she says 'No' or 'Yes'(!) the implication is that whatever happens,she's always f**ing rude to someone.
You have to show your teeth to bullies,lynny.Being nice to them in the hope they soften
DOES
NOT
WORK!!!!