Vodacom lies, router not supporting 200MBps when it can support 300

Huawei Router 2.4GHz signal does not go above 80MBps, I have increased my connection to 200MBps but the router caps it to 80. My router is downstairs and I work upstairs so I can't use a LAN cable and 5GHz is too weak going through concrete. Your Router specs say it can handle 300MBps at 2.4GHz but it isn't. Why sell me a line of 200MBps but your router can't handle it. Are you lying to customers now? Do you have faster routers? Should I buy my own router because of your lies? - 802.11a/n/ac@ 5GHz up to 1300Mbps; 802.11/b/g/[email protected] up to 300Mbps