Impossible to get hold of

This is a last resort as I really don't want to write a bad report for Vodacom on Hello Peter. But I need to get in touch with them to clarify some account matters. I've moved country, and while I now have no way of dialling into their queuing system from overseas to be switched through to finances (before I get to the end of their queue, my phone money here is drained), they refuse to discuss anything financial by email. I would like to ask them, how the heck am I supposed to have my query resolved with this refusal of theirs to communicate?

Vodacom, I know you answer Hello Peter. Over to you.