email their manager and ask them why you didn't get a pay raise because your manager isn't answering questions.
Also, important: did you clearly indicate you wanted/expected one beforehand?
Many companies break down a cost of living adjustment separate from a performance increase, and it sounds like at the very least the op should be asking about a missing cost of living adjust.
yup
If at that point they dont' give you actionable feedback, get a competitive job offer and share it with the head of HR at your company along wiht a short note saying that you can't afford to keep working there.