Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Worst monitor I've ever had

I received this monitor as a shower gift and I cannot get it to work. I've called customer service 4 times with no resolution. They sent me a replacement base and replacement rechargable batter pack, but it did not fix the problem. I believe there is a short in the on/off switch in the parent unit. This is far to much hassle for me at 9 mos pregnant preparing for baby's arrival. Be prepared, customer service consists of ONE person. I've waited on hold for over 20 mins at least twice. I'm returning this poor product for something different.