Wrong Network Unlock code for AT&T G950U please refund credit

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Wrong Network Unlock code for AT&T G950U please refund credit

UNLOCK INSTRUCTIONS:
Unlocking with original MSL code:
Warning! Knox warranty must be active (0x00)!
If you have it voided (0x01(void)), then you can't unlock this phone with MSL.
1. Phone must be powered on.
2. Type *#0808# and select 'DM+ACM+ADB'.
3. Run dialer and type *#0*# (service mode will appear).
4. Connect the phone to USB cable, choose correct COM port in port settings.
5. Press 'Unlock' button.
6. Paste MSL code in new opened window and press 'OK'.

Unlocking using Server:
1. Power on the phone.
2. Tap 7 times on 'Build number' in 'Settings'-'About phone'-'Software information'
to enable 'Developer options',
go to 'Settings'-'Developer options' and enable 'USB debugging'.
3. Connect the phone to PC with USB cable, install drivers if needed.
4. Select device in ADB settings.
5. Press 'Unlock' button for direct unlock, write your login and password in window if it will appear.
(Login and password will be saved as default after first input and can be changed in settings)

Reading codes using sever:
1. Power on the phone.
2. Tap 7 times on 'Build number' in 'Settings'-'About phone'-'Software information'
to enable 'Developer options',
go to 'Settings'-'Developer options' and enable 'USB debugging'.
3. Connect the phone to PC with USB cable, install drivers if needed.
4. Select device in ADB settings.
5. Press 'Read Codes via server' button, write your login and password in window if it will appear.
(Login and password will be saved as default after first input and can be changed in settings.)

Operation: Read Codes via Server
Selected model: SM-G950U
Software version: 33.5

Checking Login and Password... OK
Ballance: 50 crd.
You have 50 credit(s) left. This operation takes 5 credits.Continue? Yes
Waiting ADB device... OK
Reading phone info...
Model: SM-G950U
Android version: 8.0.0
PDA version: G950USQU5CRG3
CSC version: G950UOYN5CRG3
Phone version: G950USQU5CRF1
Product code: SM-G950UZKAATT
CSC country code: USA
CSC sales code: ATT
Phone SN: R38J40KK94V
IMEI: 355986083348798
HW version: REV1.0
RF cal date: 2017.04.19
Chip name: MSM8998
Modem board: MSM8998
Security patch: 2018-07-01
Boot Warranty bit: 0
Waiting for device to become ready... OK
Initialization zTool... OK
Running zTool, please wait...
Start... OK
Initialization... OK
Generate and check client proof... OK
Verify proof by client... OK
Reading data from phone... OK
Searching Ramdump interface... COM28 detected
Reading data from phone... OK
Calculating... OK
Searching server... OK
Waiting for server answer... OK
Freeze code: 91740268
NET lock: 92857052
SUB lock: 00000000
SP lock: 00000000
CP lock: 00000000
For check lock status: *#7465625#

Done with Samsung Tool PRO v.33.5


I also have screenshot of device says invalid code