How do you contact a human being at OVO (from overseas)?

I am trying to settle my Mother’s account (she’s been in a Nursing Home since February). Her house was sold in June. I’ve tried ringing the OVO number for weeks but usually give up after 30 minutes sitting in a queue.

Also, I’m phoning from Australia (+11 hrs time difference) so the phone opening hours are not very suitable from here.

If someone from OVO reviews these groups, is the only option to do this via snail-Mail ?  I see no email option anywhere on your website.

Thanks in advance.