Write a script which make a phone call to predefined phone numbers mongo-DB Stitch

Writing a code which triggers when value (is_emergency) in mongo-DB atlas collection is changing from false to true. The code will trigger a phone call to a predefined phone numbers which locating in other collection of the same DB. The most important thing is when the phone call is answered by the receiver the code will play one of the predefined voice messages. Then after call has been answered set the above MongoDb value (is_emergency) back to false. You can use any third party services (e.g Twillo) but priority will given to the less expensive solution. Our budget is 50$-70$. Thanks, IRONMAX.