Hello ,
All your requirements shall be fullfilled.
IVR can be designed in recorded human voice or Google text-to-speech in multi-languages
All calling gateways will be implemented successfully with proper A2billing system .
we have 8+ yrs experience in the asterisk and related systems (A2Billing, SugarCRM, vicidial / goautodial, freepbx, elastix, asterisk now, multi-server load-balancing system )
we are a team of 5 experienced professionals and are able provide 24*5 chat/email support.
we will provide you after-sales free support valid for 3 months.
+ demo + testing + successful deployment + then we would handover the system
Total billing would cost you around $1500 USD. no milestone complete payment after successful testing
you job will be completed within 2 to 3 days.
Best Regards
Sachet Chanchawat