It’s tough, but train back the bottle feeding or switch to cup feeding. Baby can’t keep starving while waiting for you, and you can’t breastfeed forever. Hang in there, dear. Retrain your LO again. It’s good that you’re at work, so that he’ll realise he has no choice but to use the bottle. My LO was like that too. Took a week for her to give up and drink from the bottle
Have to depend on individual baby. Some baby prefers bottle over cup. Have to try and error to know what suits baby the best.
Cherlyn