Hello we want the comment that the administrator adds from virtuemart order list.This comment is sending with email to the client and is stored on orders_history table

Hello,

but there's no notification about new comment from VirtueMart to our plugin.

is any way to have something custom?

Hello,

We can implement a plugin for VM SMS for you that would send the comment to your customer by SMS as a paid service. Estimated time required to implement this functionality is 5 hours. The pricing depends on the selected response time, please see: www.artio.net/e-shop/support-services/joomla-support-1h

hello if the extra field is the delivery date is easier;

thanks

Hello,

If you want to send the SMS notification to your customer when you change the delivery date in an order instead of when you add a comment, it would be a little simpler, but not much. In that case the time required for implementation would be 4 hours.