cable modem connection

[baker]

Hi i bought a new cable modem and had it activated, and recently I plugged in my old one and it still gets online,, even though I switched months ago.. Is there a way to bridge my two modem connections to get better internet without having to pay for a speedify account? can anyone help me with this

https://www.amazon.com/TP-LINK-TL-ER5120...and+router

this will combine the 2 modems and make 1 fast connection.

I looked at that it looks like theres only one ethernet port for input how would I hook the second modem to it