What Is The Best Way to Consume Existing Vodafone Pay and Go Credit?

Hi everyone,

I've recently spent the last few months abroad and have recently returned to Australia. In an effort to keep my mobile number active without paying significant charges, I transferred my number onto a Vodafone Pay & Go prepaid service before I left. Now that I am back, I am keen to switch to a different plan that offers talk time, texting and data at cheaper rates.

However, I do still have $30 worth of credit under my existing Vodafone Pay & Go service. My question is, do you guys know what is the best way to consume this $30 worth of credit (apart from calling/texting/using data)? Are there any services that accept this as payment?

I understand that it's probably a sunk cost but I just thought I'd ask the community if anyone has any ideas.

Thanks!