What is the reason for promoting option not working properly since last one month?

[rezazul1236]

No kind of promotion option has been working in my gig for the last one month and impressions are decreasing.
Even after giving an auto CPC rate, no clicks or impressions are coming. What should I do in such a situation and how can I live chat with customer support? And how to present my problem to them? How much should I keep my daily budget?