Customer support executive for US timezone

We are looking for highly skilled customer support executive who can help us:
- Reply to emails/ Fb messages from customers
- Check and reply comments on Fb postsx
- Answer phone calls from customers
- Report order changes requested by customers everyday

In short, we have to engage the users in a polite way and answer the threads on a timely manner.

We need few executives who can work in US timezones.

High command in the English language is a must.