Someone from TPG called me today (Wednesday 23/10/ 19) prior to 14 00 and then made adjustments to my modem (remotely). I later asked several people to call from mobile and landlines and all were unable to call my landline and received messages that the number called was busy or engaged. OK, I realise that this is a difficult problem as it is intermittant but it has "supposedly" been fixed at least twice before. Each time it recurs about one month later.
I'm sorry to learn about the recurring phone line issue you're having. I checked your account and from what I can tell, this case has been raised to our Engineering Team already. In addition, a Phone Engineer has contacted you earlier today. From what I gathered, adjustments have been made to get the phone to work which you were able to confirm as well.
I can see that this is still under monitoring by our Phone Engineers. Should you need further assistance, please don't hesitate to leave a comment.