Definitely don't wait. I don't know what the structure is like where you are, but some companies require evidence to support pay rises and promotions. If you talk to your manager now, you can work together to ensure all the evidence is ready for 3 months time, if not sooner.
For further actions, you may consider blocking this person and/or reporting abuse
We're a place where coders share, stay up-to-date and grow their careers.
Definitely don't wait. I don't know what the structure is like where you are, but some companies require evidence to support pay rises and promotions. If you talk to your manager now, you can work together to ensure all the evidence is ready for 3 months time, if not sooner.