This response is unacceptable and ridiculous. Not only did your previously offered hardware (Sagemcom, Technicolor) already support configuring parental controls with multiple time slots for the same MAC Address, your response is essentially a unhelpful "thanks for the feedback, please come back again with more issues, and we'll do absolutely nothing to help you resolve things".
I would deem this issue as vital functionality for a parent/user wanting to restrict access to the internet for certain users on a LAN. In my opinion, you as a Telstra support person should be making every effort to escalate this to the right people in your company to resolve ASAP, for deployment in the next firmware auto-update.
This could easily be resolved if we as your customers were given the option to BYO our own more powerful and capable routers (with comprehensive parental control and monitoring options), but you've deliberately made it difficult for us to completely replace your simpleton Arcadyan hardware (by not disclosing SIP and VOIP settings), so that we can retain proper landline functionality whilst using our own routers.
If you've forced your customers to use this so-called 'Smart Modem' to access the internet on Telstra, you should at least provide top-notch support and features for it too.
Hello