Business Communication Through Taxi App

I have this script

https://codecanyon.net/item/droptaxi-white-label-taxi-app-software-script/32257649?s_rank=1

Please read the script and see if you can do this language it is in native The script is a taxi app what I am looking for is when a driver contacts a customer and it should go to voice messaging so the both driver and passenger can contact each other via voice messages. This is what I need.
Both apps, android and iOS the code must be neat and tidy with bug free. I will check it and if everything is okay then I will pay you remember this do not start to cry and say that I need the money now