Ethernet connection on Verizon 2.4GHz and 5GHz. How do I change 2.4GHZ up to my 5GHz network speed?

My existing Verizon FIOS connection internet as 2.4GHz and is too slow and bogs down way to much.  How do I change my existing SLOW 2.4GHZ network connection up to my other higher 5GHz network speed?

I know I paid for the 2 higher speeds and need to decrease the "spining circle" slow downs?