Hi Ronyan, it shouldnt be a problem showing them your expired drivers license from phils. If you go to the their website, it shows there they accept overseas license as long as its not 5 years expired. i know this because i was in a simillar situation, possibly much worse, aside from names not matching- married name on passport, visa, and medicare id. I lost pa my drivers license - thats still on my maiden name, good i found my old license which is already 3years + expired. They accepted the expired one even if my name there was also my maiden. I just showed my NSO marriage cert. I think it depends on the branch - kun mas lenient, also personel na makaharap mo. This branch was in the Adelaide.
Mind you, I tried similar tactic sa Marion branch before- it didnt work. I mean they dont accept overseas marriage cert. You have to have an Apostille Certificate or stamp. Or if you are living in SA for 12 mos or more, you can book for a CBS change of name appointment. Both process cost around $220+@, you can chose either but for the CBS change of name, it will take 3 mos. Not sure how long for the apostille stamp on your overseas marraige cert.