Yeah, it was BB30. You’ve already done the most expensive part which is getting cranks to fit something else - I’m assuming you’ve just got crank adaptors pressed into the bearings. I took mine off when it was brand new and fitted a Shimano one with adaptors because I was expecting this to happen - sold the other one to recoup most of the cost which is easier when it’s new.
I used this one -
https://wheelsmfg.com/bb30-to-outbo...-cranks-shimano-w-ceramic-bearings-black.html
Seems decent. The ceramic bearings are a waste of money but I know a guy with a bike shop and he gave me a good deal as he had it sitting there.
The main thing you have to watch with Cannondale is that often there is a machined ridge in the shell which means you can’t use one of the press in threaded adaptors - the ridge stops it going through. That 2 piece type is fine as long as it gets narrower just inside where the cup bits are like that one does
You can easily knock the bearings out carefully with a screwdriver and hammer but you should need a press to get the new BB in. Mine actually went in by hand showing how bad the manufacturing is - but I’ve got away with it because the thread together part has held it tight. If it makes noise my next idea is retaining compound in there to stop it moving at all - been okay so far though.
The other one that gets a good name is C-bear. They press in rather than thread together but are meant to be good. More expensive though.