Why have 3 suddenly closed my account

[Felix54]

A few days ago I was receiving Sorry to hear your leaving  us bla bla bla. I called three telling them I had never asked for a pac and was mot leaving. I thought  they'd  sorted it out, No now I'm unable to make calls as I'm not on a Network, and tried to access my mobile app to see it has been closed 

[Anonymous]

Well if you absolutely haven’t asked to leave by asking for your PAC,had no intention of leaving and don’t owe any money causing your number to be disconnected then it points to fraud. Three wouldn’t randomly move you off the network.Check first to ensure your bills are up to date and you’ll have to use WiFi to raise a complaint via the Three homepage.

[Anonymous]

Just as an afterthought are you payg? Have you made a chargeable event during the previous 180 days?