Hi Arthur,
It's up to the uni as to which subjects they wish to give credit for. There's a handy tool each uni generally has called a credit search, which is a guide as to how much / what credit you can get if you transferred from one institution to another. AFAIK, it is based on the outcomes of past students hence why some units are not on there. I put the units you listed into
Monash's credit search tool and it appears that you can get credit for ENG1005 - Engineering mathematics at Monash if the subjects you listed were completed between 2017-19 (although this is subject to change for 2020 and beyond).
I also tried putting a Monash math unit (MTH1020) into the UniMelb credit search and it just said that it can be counted as 12.5 points towards a Bachelor of Science.
Are you wishing to transfer? I guess all you can do to find out is to contact the uni again or in a different way to what you did previously (if you haven't already) (e.g. Stop 1, calling 13 MELB (13 6352)). If you do wish to transfer to UniMelb, I'd recommend viewing your desired course's entry requirements (under "Completed all or some of a higher education qualification"). If an offer is made to you, you can then apply for
advanced standing to potentially gain credit from past higher education studies.
Sorry this wasn't much of a help
All the best with uni!