1. The headphones she ordered didn't work and when she sent them back, she received the wrong pair and sent them back again and the next pair she got were broken and didn't work.

Fragment w tekście: "I got some headphones from you online but the didn't work. So I sent them back and you swapped them for a new pair. They weren't the right ones, so I sent them back again. I got another pair (...) and they're broken and they don't work." - Kupiłam od was przez internet słuchawki, ale nie działały. Dlatego je odesłałam, a wy wymieniliście je na nowe. Jednak nie były to właściwe słuchawki, więc znów je odesłałam. Dostałam nowe, ale były zepsute i nie działały.

2. No, it isn't formal. I think that because Ronnie uses short forms (such as didn't, weren't, don't, etc.) and many colloquialisms.

Fragment w tekście: "Your company is rubbish." - Wasza firma jest do kitu.