I ported to A&A earlier this month and it was a sour ear of a migrate.
I could make outgoing calls, but incoming were going to old non VOIP landline connected to the VF router, then some to A& A and others to DECT, took a week to sort out and not sure if every number does work as only time will tell.
They said it was to do with routing tables that VF had added number to or something.
It sounds like you had a more complex previous setup than I did, which may have required some manual intervention from you before the port.
In my case I couldn't work out what was happening so I phoned A&A support this afternoon and it turned out that the SIP routing string entered into their system had @@ in it instead of @. Once that extraneous @ was removed it instantly sprang to life.
What was interesting was that calls that were not routed in yesterday or this morning are showing up in my missed calls list. That suggests that they reached Magrathea but the A&A server couldn't route them, a symptom being that the failure reason was different depending where the call originated. Some networks would not even place the call, so my EE mobile hung up with no audio heard and Call Ended on the screen. Virgin mobile gave a digital Dot message about being unable to connect the call, please try again later while a call from another VoIP phone from a different supplier was getting a busy tone.
Perhaps some input sanitising scripts could be usefully deployed.
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Brian
UW (Talktalk via openreach FTTP) full fibre - 500/80