Welcome to TPG Community!
We're sorry to know that you're experiencing issues with the service. Have you perhaps checked the settings on your phone? How about some troubleshooting done on your end?
I'll have someone from our Technical Team to assist you on this however since all the calls are routed to voicemail, organising a call back on your number might not work.
Could you please send another contact number via private message if possible, otherwise, can we reach you via email instead?
Alternatively, you may contact our Mobile Support team at 13 14 23 (options 2 + 3)
We'll wait for your response.