I saw your speed test results, that is from 4G, mobile not connected to WIFI,
I just went through your full connections, and remotely access to your router.
please try these steps
turn off wifi on your router ( make sure nothing is connected )
connect your PC or laptop with LAN cable - run the speed test, I am sure you will speed is over 85Mbps.
2 Now connected your mobile phone over 5G wifi, do a speed test close to the router and run another one far from the router,
do the same testing for 2.4G wifi as well,
so you will understand how wifi works,
bandwidth sharing means - when multiple devices do streaming or downloading your total speed will be shared to each device, at this stage if you run a speed test. it will be slow
I remotely access to your router did a speed test this is what I got,
I can see mobile connected to 2.4G wifi; please try 5G wifi, also if you got any NEW IOS or Samsung devices to run the test, I have seen many, mobiles are not cooperating to run 100MB plan, due to hardware and power-saving mode
Please send speed test from your laptop or PC with LAN cable,(not wifi)
if still failing, please let me know. I will ask can we get someone to run the test,
callback in progress for you. the engineering team will contact you, once someone available.
(Due to precautionary measures to protect our staff from the COVID-19 outbreak, TPG’s telephone support team members will be transitioning to working from home. We appreciate your patience as you may experience longer wait times.)