A 24months warranty not upheld instead they talk about 6 months!!!

I purchased a Xiomi mi band 6 in August 2020. It has a warranty of 24minths. February it started giving me slight problems that I disregarded and they got worse with time mainly the touchscreen lags, you can't use it when you want to because it won't come on then and there when you swipe.

In April I complained it was picked up between the 4th - 7th. About 2 weeks later I was told that there is absolutely nothing wrong with the band, so I went out of my way to complain about something that is in perfect condition a cherry on top is that I don't have a watch for a month because of this, why would anyone inconvenience themselves and log a complain if there is nothing wrong with the item. Now they want to return the band without fixing it nor exchanging it they are saying that they can only do exchanged withing 6months so why is there 24minths warranty on the item when in actual fact it's 24months?

Take a lot should stop taking after sales service for granted because we can just go straight to its suppliers to get the items and a better service. There are also other online markets like One and Only that one can support, as it clearly shows that what they write on their website is not practiced at all.