At 55 days, your baby moving around during paladai feeds is normal, babies this age get much more active and distractible. The choking usually happens when milk flows faster than he can manage while he is wriggling. Bottle refusal of the breast is also common once a baby gets used to a faster, easier flow. It is not that he is rejecting you.
Next Steps
Hold him semi upright and feed slowly from the paladai only when he is calm, pausing often so he can swallow comfortably. If you keep using the bottle, pick a slow flow nipple and offer the breast first when he is calmest and hungriest, such as right after waking.
Health Tips
See your paediatrician soon if he keeps choking or coughing during feeds, or if his weight gain seems slow.