Had same caller yesterday. claiming to be EE, told her not with them click

Claimed to be from EE. Lady with strong Indian accent. Said they were going to give me 20% off my bill. I asked why, she said for poor service .... I said my service is excellent. She said in order to give me discount she 'just needed my password'. I told her I wouldn't be sharing that with her and she didn't want to chat anymore.