What WiFi relay system can I host at home?

I live in an apartment that provides WiFi that has MAC address whitelisting with a cost per MAC address slot.

What hardware/software can I use to connect to their network and rebroadcast in a new network so that all my devices can connect but the WiFi provider only sees one MAC address connecting?

I've tried a WiFi range extender but it appears to be forwarding the MAC address of the my devices

To be clear, the ISP broadcasts its own SSIDs throughout the apartment block and I don't have access to any physical network sockets