"Split Bands (not recommended)" ??

I am having difficulties with an IOT device and was told to have Comcast segregate  the 2.4 and 5 GHz bandwidths with different names so that I can connect specifically  to the 2.4 network. Currently, both bands have the same name. I cannot get through Xfinity Assistant to reach a live agent to help with this problem.

Can someone please help me here?