I recommend you do the following:

1) Live chat using Olark.com (use an app on your phone as well). Free or starts at $17/month.

2) VOIP toll free number that forwards to your cell or even converts voice mails into mp3 and forwards it to your email. It's very professional. Use Grasshopper.com starts at $12/month

3) As for emails, I would recommend using Zendesk.com. Easy to use, app included as well. Starts at $2/month per box

Those 3 solutions will make you look like a big brand with minimal cost.

All you have to do now is answer customer inquiries on time :)

Hope this helps.