Idk what to do PLS HELP.

Yeni

So i have 15 week old baby, i breastfeeding him since day one. Before i was pumping and given him the milk in a bottle and i stopped so i was only breastfeeding. Its been like a month that i haven't given him a bottle. Now im try to give him a battle and he won't take it. I've try every bottle and no luck. I don't know what to do. Pls any advice. Pls help.