Samsung GT-E2250 network unlock please help

Good day

I have problem with old Samsung GT-E2250, my company changed sim cards and they are unable to find my network unlock code.

Phone is nothing special i can take it to unlock it in service but cost of unlock will be much higher than phone itself.

I will give you information and if you are able to help me i would be forever grateful to you.

Model:Samsung GT-E2250
IMEI: 351849/05/181489/0
S/N: RV1C7594R7T
Network: Telenor

Thank you once again for any help.