You need a .wav file for the prompt. It must be 8khz, 16 bits mono. If you are okay with menu selections 5 and 7, you can use mine. It is at the bottom.
Logon to VoIP.ms.
Upload the .wav file here: https://voip.ms/m/recordings.php
Create a new IVR here: https://voip.ms/m/ivr.php
Give it a good name.
For first choice digit, enter 5 and select appropriate SIP/AIX or Ring Group.
Add another choice
For second choice digit, enter 7 and select system and hangup.
Add another choice
For 3rd choice digit, enter t and select voicemail.
Hit save IVR
Edit DID here: https://voip.ms/m/managedid.php
Edit the appropriate DID.
Under Main, select IVR and the IVR name you picked earlier.
Apply changes.
Done!