A 28-year-old woman named Saoirse was accused of bullying a co-worker after she repeatedly used the wrong name to talk to her. OP's misnaming of her co-worker, Kate, was not accidental.
OP is used to people misspelling her name. She typically doesn't fault others for making mistakes with her name, but when Kate deliberately uses multiple wrong names to talk to her, OP's patience runs out.
She permitted Kate to use her middle name, Rifle. OP doesn't know the story behind her middle name, but it was the name given to her by her parents, who have since passed.
Kate also had a problem with OP's middle name and refused to use it. Instead of learning how to spell and pronounce OP's names, Kate called her Sirsha, Siersha, and Sasha alternatingly.
Kate wrote them on official company papers, which created a lot of issues for OP. She had to reach out to their boss to correct her name on their company records.
Kate also said "Rifle" isn't a real name, which OP agreed with, but it was her name. OP felt Kate needed to understand how disrespectful and annoying it was to be called the wrong name.
So, OP called her Kathleen, Catelyn, Kylie, and other variations of her name. Kate got upset and accused OP of being a bully.
OP told Kate she was the bully because she constantly misspelled her name.
OP informed Kate that she wouldn't use the correct name to talk to her until she respected her name. OP also filed a complaint to HR, but the report went nowhere.
OP could send this video to help Kate spell and pronounce her name.
OP gave Kate a lot of chances to get her name right. She even permitted her to use her middle name when she talked to her.
Neither was acceptable to Kate, as she preferred to insult OP to her face. Until she learns how to respect others, Kate should get used to the rotation of names OP found for her.