I'm sorry - that is really low - and they a have a lot of nerve to expect that from you... have to give you credit for showing class to actually "train them" - it would be tempting to just walk and then watch them flounder.... loyalty in companies today toward employees is really becoming non-existent...
Take care of your health first..... cause is it gonna make the PN snap at you.... and sending good thoughts to you for all of this.....