Campaign spends drop suddenly.

Hi everyone, my campaigns were performing well, but suddenly, they stopped spending as much as before. I tried increasing the bid and broadening the audience, but the spends are still not picking up. We faced the same issue last month, but it resolved automatically. However, since the second week of January, we've been facing the same problem again. We tried contacting the Meta campaign manager, but it hasn’t been resolved yet. Any advice?