Can you assist me with PBX system? I have a Google Voice Number …

Can you assist me with PBX system?
I have a Google Voice Number that I use.  I’d like to continue using my goggle number but provide options for my callers.  Id like my callers to have roughly 4 options to connect to different people based on their needs.  So I would need it to say “Press 1 for this, Press 2 for that, etc.”  My issue is that I do not know how to set that up with the Google phone number I already have.  Also, I would also like it to be very budget friendly. ? $80

April 1, 2017