To do what you are suggesting you need a feature called mimo or mu-mimo. What it does is aggregate multiple channels together to get you double or triple the WiFi speed.
The bad news is this...to make it work properly both your computer and your router need to be mu-mimo capable. That means they have the antennas necessary to send and receive multiple data streams and the firmware to combine them back together again. Also mu-mimo can send and receive data at the same time rather than changing off between transmit-receive modes. So you need matching hardware. Then you need to hope that your hardware decides to actually use the mu-mimo speeds and not kick you off to a slower speed.
I understand the C7 is a good router and you are probably getting better speeds since it has more channels and bands it can support more clients and give you the best possible speed. But it won’t aggregate the channels.
TP Link has more expensive WiFi Routers and their are better wireless cards supporting mu-mimo, but until mu-mimo is more generally available in Laptops and Routers it might be an expensive Wild Goose chase.
Side Note check out Ubiquiti 802.1ac Access Points.