If you'd like to get in touch with the foreign credit bureau, you may do so as follows:
General customer support:
Australia (Equifax): https://www.equifax.com.au/personal/help-centre
Brazil (Serasa): customer support phone number: 3003-6300 or online: https://ajuda.serasaconsumidor.com.br/hc/pt-br
Canada (Equifax): https://www.consumer.equifax.ca/personal/contact-us/
Canada (TransUnion): https://www.transunion.ca/customer-support/contact-us
India (CRIF Highmark): email customerservice@crifhighmark.com
Mexico (Circulo de Credito): https://www.circulodecredito.com.mx/faq/preguntas.html
South Korea (NICE): call +82 1588 2486 --- (Note: they only speak Korean)
United Kingdom (Equifax): www.equifax.co.uk/ask
Nigeria (CRC): support@crccreditbureau.com
Dispute-specific questions:
Australia: https://www.equifax.com.au/personal/resolution-centre
Brazil: customer support phone number: 3003-6300 or online: https://ajuda.serasaconsumidor.com.br/hc/pt-br
Canada (Equifax): https://www.consumer.equifax.ca/personal/dispute-credit-report/ or phone: 1-866-828-5961 (Eng) or 1-877-323-2598 (Fr)
Canada (TransUnion): https://www.transunion.ca/assistance/credit-report-disputes
India (CRIF Highmark): email customerservice@crifhighmark.com
Mexico (Circulo de Credito): https://www.circulodecredito.com.mx/ReclamacionInternet/ or phone: (55) 5166 2455
South Korea (NICE): Disputes should be made directly to the financial institution that is the source of the error. You may also call NICE at +82 1588 2486 (Note: they only speak Korean)
United Kingdom (Equifax): www.equifax.co.uk/ask
Nigeria (CRC): support@crccreditbureau.com