Which service to choose for high-quality video broadcasts?

Question

Electronic commerce

It is necessary to conduct a high-quality online broadcast with the possibility of selling (display the button at the right time) and chat, the number of viewers is at least 200 people. The budget is not very big, you need proven companies. At the moment we use webinarbox.pro and Google Hangouts, but the quality of the video leaves much to be desired, we are looking for an alternative.
Thanks in advance for your replies.