Report broken DNS node?

Hey all, I have found a broken DNS node thats run by virgin media. Any idea if there's a way I can report it? It's been broken for about a week now. Thanks in advance

The failing node (194.168.4.100) is the default DNS server for my router. Using any other standard DNS fixes my access to certain websites sites. 

▶ dig +trace +tcp @194.168.4.100 https://racing-tv-webtv.pages.dev/android A

;; Connection to 194.168.4.100#53(194.168.4.100) for https://racing-tv-webtv.pages.dev/android failed: timed out.
;; Connection to 194.168.4.100#53(194.168.4.100) for https://racing-tv-webtv.pages.dev/android failed: timed out.

; <<>> DiG 9.10.6 <<>> +trace +tcp @194.168.4.100 https://racing-tv-webtv.pages.dev/android A
; (1 server found)
;; global options: +cmd
;; connection timed out; no servers could be reached
;; Connection to 194.168.4.100#53(194.168.4.100) for https://racing-tv-webtv.pages.dev/android failed: timed out.

Working alternative route (using google's DNS). 

▶ dig +trace +tcp @8.8.8.8 https://racing-tv-webtv.pages.dev/android A

; <<>> DiG 9.10.6 <<>> +trace +tcp @8.8.8.8 https://racing-tv-webtv.pages.dev/android A
; (1 server found)
;; global options: +cmd
;; Received 28 bytes from 8.8.8.8#53(8.8.8.8) in 31 ms

Full whois below - if that helps: 

▶ whois 194.168.4.100
% IANA WHOIS server
% for more information on IANA, visit http://www.iana.org
% This query returned 1 object

refer:        whois.ripe.net

inetnum:      194.0.0.0 - 194.255.255.255
organisation: RIPE NCC
status:       ALLOCATED

whois:        whois.ripe.net

changed:      1993-05
source:       IANA

# whois.ripe.net

inetnum:        194.168.4.0 - 194.168.5.255
netname:        VIRGIN-MEDIA
descr:          VIRGIN-MEDIA
country:        GB
admin-c:        NNMC1-RIPE
admin-c:        IPAM2-RIPE
tech-c:         NNMC1-RIPE
status:         ASSIGNED PA
mnt-by:         AS5089-MNT
created:        2002-08-15T13:02:34Z
last-modified:  2023-10-18T08:37:29Z
source:         RIPE

role:           Virgin Media IP Address Management
address:        Virgin Media
address:        500 Brook Drive Green Park
address:        Reading
address:        Berkshire
address:        RG2 6UU
org:            ORG-NI9-RIPE
remarks:        Virgin Media IPAM
abuse-mailbox:  postmaster@virginmedia.com
nic-hdl:        IPAM2-RIPE
mnt-by:         AS5089-MNT
mnt-by:         AS5462-MNT
mnt-by:         DIA118-MNT
mnt-by:         DH687-MNT
created:        2019-03-27T16:41:54Z
last-modified:  2024-06-19T11:00:52Z
source:         RIPE # Filtered

role:           Virgin Media Network Management Centre
org:            ORG-CIL2-RIPE
address:        Virgin Media
address:        500 Brook Drive Green Park
address:        Reading
address:        Berkshire
address:        RG2 6UU
admin-c:        IPAM2-RIPE
tech-c:         IPAM2-RIPE
nic-hdl:        NNMC1-RIPE
mnt-by:         AS5089-MNT
created:        2002-09-13T13:38:42Z
last-modified:  2019-12-19T16:18:20Z
source:         RIPE # Filtered

% Information related to '194.168.0.0/17AS5089'

route:          194.168.0.0/17
origin:         AS5089
descr:          VIRGIN-MEDIA-UK-IP-BLOCK
remarks:        Report Abuse via http://www.virginmedia.com/netreport
mnt-by:         AS5089-MNT
created:        2017-02-27T14:10:47Z
last-modified:  2019-03-04T19:16:08Z
source:         RIPE # Filtered

% This query was served by the RIPE Database Query Service version 1.118.1 (SHETLAND)