What is the procedure of after sales service?

Firstly, customers have some question or machine not work normally, email or skype or WhatsApp please sent to tell us. Secondly, our aftersales service staff will try to solve the normally questions within 1 day. Thirdly, offer you solutions way within 2 days, such some parts need to change or repair. Fourth, any special service you may directly inform me, i will handle for you.