Each day you can send 20 call me's to a Digicel local number to call you back. This can be done by a code on your phone.
A call me request can only be sent if you have min SRD0,01 and not more then SRD0,10 on your main balance.
The code to send a call me request is *126*597number#SEND.
You will receive a notification that the request has been sent and how many call me's you have left for the day.