No support for clients overseas

I'm current overseas and with Covid-19 I'll be overseas for quite some time. Unfortunately due to non-use, my SA cellphone number was recycled and no longer have access to the number associated with Internet Banking. I've contacted Nedbank on several occasions and explained my situation, to which I've repeatedly been advised that I need to go into a branch as this is the only way to change my contact details. I cant!!!

Everything more or less still worked as it was with my existing beneficiaries, but now that they're switching to a new website, they require verification of a new account using my cell number.

I've had this account for so many years and not having a South African bank account is going to be a significant issue for me, but Nedbank is leaving me no other option but to close this account.

Nedbank, your support for clients overseas is horrid, you've really left me stranded.