Please accept our sincere apologies for this issue @Vhorlon, we'll chase this matter with our Engineers and let them know that you've already sent the test results and request them to contact you the soonest. Should you have a preferred time of contact, feel free to let us know. Thank you.
It seems the “issue” is with the wholesaler i.e. Telstra.
Change ISP’s and you’ve still got the same wholesaler, same issue and an ISP between you and the wholesaler.
I thought someone “in IT” would understand this most basic of facts.