New SIM saying network locked

[Missymoo]

I just activated my new SIM and my phone is saying it's invalid and that a network locked SIM has been inserted. It's asking me for a PUK code and when I requested one from my account it said incorrect mobile number.
I have tried restarting my phone and playing with the network settings but nothing is working.
Have I been sent a faulty SIM?

[Riezl]

Hi @Missymoo , please send us a private message with your TPG customer ID, Mobile Service Number (MSN) and complete address so we can take a look at your account.

To send a PM, please refer to this link: How do I private message (PM) in the community 

If your concern is about TPG Mobile Singapore service, you may send them an email to Singapore Mobile Team at support@tpgmobile.com.sg or visit their Facebook Page at https://www.facebook.com/tpgmobilesg/