Going back to work and baby not accepting formula

Hey mummy, my boy is having the same issue as your boy rejects formula milk. I mixed BM and formula milk, he rejects too so i find all ways to increase my milk supply I was once same as you not much BM, i power pump twice a day (pump 20 mins, rest 10 mins, pump 10 mins, rest 10 mins), consume greek yogurt, oats, milo, milk, lactation foods and drink plenty of water then now i my milk supply increased till i can store enough for him to drink while i head back to work. you can try