woo credits, minimum credit balance notifications

I have woo credits set up with woo subscriptions – currently I have set the minimum credits to 20 to send out a reminder notification to my customer(s) that they have 20 credits remaining and politely providing them with a link to buy more credits.

I want to send out a series of notifications as users credit balances reach a certain quantities, for example: 20, 10, 5 & 0

Thus I will have 4 slightly different notifications set up to be sent out each time the user reachers there targeted minimum quantities…

Is there any why woo credits can do this, or is there a way of adding this functionality to the plugin, or can somebody suggest who I can contact to have this developed for my woo credits plug in.

thanks