Unlocking my LG G7

[KH1]

Hi everyone
I bought a LG G7 ThinQ handset from Brent Cross O2 shop. Now I tried to unlock my handset for already 5 times and they give me same reason that handset is not from O2. But I had proof of purchase from O2. So I went to Brent Cross O2 and I spoke about this to one of advisor. He called to the customer service and that advisor help me a lot. But my phone is still locked and I can't use my sim card from Vodafone. Does anyone know how to solve this problem?
Thanks

[MI5]

The normal process is here https://community.o2.co.uk/t5/How-to-Guides/Unlocking-an-O2-phone-to-use-a-different-SIM-card/ba-p/1... and it's now free to unlock any O2 phone.
The message you are getting back usually means the phone is already unlocked though.
What happens when you put the voda sim in it?

[KH1]

Thanks for your reply. When I put another sim it show network locked and my phone isn't already unlocked.

[Bambino]

@KH1 If the phone is still showing as locked you need to follow the guide in the link provided above.

[MI5]

What message is shown on screen?

[KH1]

@MI5 On screen it's show network locked when I put non O2 si

[MI5]

I'd suggest you call to discuss it with O2 http://www.o2.co.uk/contactus

[KH1]

@MI5 I already spoke with customer service and not much help. Still same. I am really upset.

[MI5]

No one here can offer any more than we have done already mate, sorry.

[Cleoriff]

@KH1Your best bet now is to take it to a market stall or independent shop who unlock all mobiles.