How to unclog blocked toilet and bathroom sink?

[MrConfused]

Recently, I've been dealing with a nightmare of a blocked toilet. Last night, I inserted a hose about 1.5 to 2 meters into the pipe and let it run for about 30 minutes. During this process, there was no sign of a blocked pipe as the water flowed smoothly without any overflow. However, as soon as I flushed, the water drained very slowly, filling all the way to the top of the toilet bowl. I'm also experiencing a similar issue with the bathroom sink. I can hear air popping out from the other whenever I use either the toilet or the bathroom sink. I've included more details in the images and video, as well as the products I've used so far from Bunnings. I am confused and don't know how to fix this anymore. Any suggestions?

[arshmuglani]

Thanks for that mate,

I'll definitely try that.