I managed to fully mangle the barrel adjuster on my brake lever :-/ I was trying to loosen it and I not so smartly used a pair of pliers with excessive force promptly sheared off the adjuster. Oops!

Does anyone have suggesting for how I might get the remaining piece out in order to replace it? Or alternatively suggestions for affordable replacement levers? The metal seems strangely soft and my attempts with pliers seem only to further mangle. I'd be grateful for any tips. Thank you!