My guess is that this is the listing.

https://www.amazon.com/Bells-Steel-Adjustable-Kettlebell-Kettlebells/dp/B0BJ7KNFBP/ref=sr_1_5?keywords=bells%2Bof%2Bsteel%2Badjustable%2Bkettlebell&sr=8-5&th=1&psc=1

There are two options here.

One for the 20.5 kg for $250...which should be the bell with 8 kg of weight to get to 20.

Another for the 13kg expansion ($150). This is the extra weights.

They don't seem to have a listing for the 32 kg bell (which is both of these together).

Looks like both parts of the Amazon listing are selling for more than the BoS website (which I think is pretty common if you can get something from the actual manufacturer).

On BoS, the 20 kg is $200, the add on package is $110, and the whole 32 kg package is $300.

If you spend $250 on that Amazon link, I think you should have gotten the bell and 8 kg of weights to go inside of it.