8x8.com — Horrible
Before dealing with customers your staff should be trained. They should know everything about your products, all characteristics, and features it has, about of the bugs, why it can be glitchy, why sometimes it doesn't work, because nothing is perfect, they should have options how to fix it and so on and on and on.
In reality, your customer service is clueless. I talked to 3 people and all of them are poorly aware of how to help, even though in my opinion the issue was simply, but couldn't be fixed without their help. Well, thanks for nothing ad good bye.