Unlock lg ls 992 after reset locked back

this is the log
1/29/2019 12:50:56 PM: LG 2-3G Tool v9.59
1/29/2019 12:50:56 PM: supported models: 1568
1/29/2019 12:50:56 PM:
1/29/2019 12:53:06 PM: Not detect phone! Please manual select port or reboot PC!
1/29/2019 12:53:15 PM: Not detect phone! Please manual select port or reboot PC!
1/29/2019 12:53:56 PM: Not detect phone! Please manual select port or reboot PC!
1/29/2019 12:53:57 PM: Mode: Normal
1/29/2019 12:53:57 PM: Model: LS992ZVF
1/29/2019 12:53:57 PM: Build version: Feb 1 201810:10:44Aug 14 201711:00:00LS992ZVF
1/29/2019 12:53:57 PM: SW Version: MPSS.TH.2.0.c1.4-00060-M8996FAAAANAZM-1.102675.1.109838.1
1/29/2019 12:53:57 PM: IMEI: 35560207490140-0
1/29/2019 12:53:59 PM: BlueTooth Address: 00:00:00:00:00:00
1/29/2019 12:53:59 PM: Phone Code:
1/29/2019 12:53:59 PM: Elapsed: 2 secs. --> (v9.59)
1/29/2019 12:53:59 PM:
1/29/2019 12:54:03 PM: Mode: Normal
1/29/2019 12:54:03 PM: Model: LS992ZVF
1/29/2019 12:54:03 PM: Build version: Feb 1 201810:10:44Aug 14 201711:00:00LS992ZVF
1/29/2019 12:54:04 PM: SW Version: MPSS.TH.2.0.c1.4-00060-M8996FAAAANAZM-1.102675.1.109838.1
1/29/2019 12:54:04 PM: IMEI: 35560207490140-0
1/29/2019 12:54:05 PM: BlueTooth Address: 00:00:00:00:00:00
1/29/2019 12:54:05 PM: Phone Code:
1/29/2019 12:54:05 PM: Elapsed: 2 secs. --> (v9.59)
1/29/2019 12:54:05 PM:
1/29/2019 12:54:07 PM: Checking Login and Password...
1/29/2019 12:54:31 PM: OK
1/29/2019 12:54:31 PM: Ballance:
1/29/2019 12:54:31 PM: 5 crd.
1/29/2019 12:55:22 PM: You have 5 credit(s) left. This operation takes 5 credits.Continue?
1/29/2019 12:55:22 PM: Yes
1/29/2019 12:55:24 PM: Searching modem interface...
1/29/2019 12:55:25 PM: found COM400
1/29/2019 12:55:25 PM: Reading data from phone...
1/29/2019 12:55:25 PM: OK
1/29/2019 12:55:25 PM: IMEI: 355602074901400
1/29/2019 12:55:25 PM: Searching ADB Device...
1/29/2019 12:55:25 PM: fail
1/29/2019 12:55:25 PM: Device not found
1/29/2019 12:55:25 PM: Elapsed: 3 secs. --> (v9.59)
1/29/2019 12:55:25 PM:
1/29/2019 12:58:36 PM: Mode: Normal
1/29/2019 12:58:36 PM: Model: LS992ZVF
1/29/2019 12:58:36 PM: Build version: Feb 1 201810:10:44Aug 14 201711:00:00LS992ZVF
1/29/2019 12:58:36 PM: SW Version: MPSS.TH.2.0.c1.4-00060-M8996FAAAANAZM-1.102675.1.109838.1
1/29/2019 12:58:36 PM: IMEI: 35560207490140-0
1/29/2019 12:58:38 PM: BlueTooth Address: 00:00:00:00:00:00
1/29/2019 12:58:38 PM: Phone Code:
1/29/2019 12:58:38 PM: Elapsed: 3 secs. --> (v9.59)
1/29/2019 12:58:38 PM:
1/29/2019 12:58:41 PM: Checking Login and Password...
1/29/2019 12:58:43 PM: OK
1/29/2019 12:58:43 PM: Ballance:
1/29/2019 12:58:43 PM: 5 crd.
1/29/2019 12:58:45 PM: You have 5 credit(s) left. This operation takes 5 credits.Continue?
1/29/2019 12:58:45 PM: Yes
1/29/2019 12:58:47 PM: Searching modem interface...
1/29/2019 12:58:47 PM: found COM400
1/29/2019 12:58:47 PM: Reading data from phone...
1/29/2019 12:58:47 PM: OK
1/29/2019 12:58:47 PM: IMEI: 355602074901400
1/29/2019 12:58:47 PM: Searching ADB Device...
1/29/2019 12:58:50 PM: OK
1/29/2019 12:58:50 PM: Reading data from phone...
1/29/2019 12:58:51 PM: Searching server...
1/29/2019 12:58:55 PM: OK
1/29/2019 12:58:55 PM: Waiting for server answer...
1/29/2019 12:58:57 PM: OK
1/29/2019 12:58:57 PM: Writing zTool...
1/29/2019 12:58:58 PM: OK
1/29/2019 12:58:58 PM: Initialization zTool...
1/29/2019 12:58:58 PM: OK
1/29/2019 12:58:58 PM: Unlocking...
1/29/2019 12:58:58 PM: OK
1/29/2019 12:58:58 PM: Unlocking done
1/29/2019 12:58:59 PM: Elapsed: 13 secs. --> (v9.59)
1/29/2019 12:58:59 PM:



after i unlocked it the customer came back and said it is locked back.
Pls refund back or make a permanent unlock for me.