Home "Can't" Connect

Just One Word - Atrocious,

For the past 5 months I have been paying for a 100mb symmetrical line, and for the past 5 months I have not received close to that speed, even after exchanging a router from you and multiple unresolved/ unanswered/ incomplete tickets logged with your technical support team, where we have tested all manners of connecting to the router, 2.4 ghz, 5ghz and also connecting via Lan with the following results,

2.4 ghz - 27 mbps 5 ghz - 54 mbps Lan - 64 mbps

The technical team have tested on multiple occasions and kept finding approximately the same results as above. We then proceeded to split some of my connections between the 2 frequencies with the result remaining the same. Noting the capability of the router (Tenda AC1200 model: AC6) you provided below,

2.4 ghz - up to 300mbps 5 ghz - up to 867 mbps

Why is your Technical team trying to state the only way to get these speeds are with LAN connection when this is simply not true and far below the capabilities of the router you provided.