Bronchitis, gas, chest pain. In south.

Sir, my father aged 62 years recently encountered with breathing problem and now after treatment with doctor,,breathing problems is somewhat ok but his coughing continues .After 1 month suddenly at night gas coming out of his mouth and also pain the chest at same time. When he went to the toilet,he felt somewhat ok and fine,no pain. He is hospital now in Siliguri. Doctor says he heart is weak. I want to consult with doctors in south india. For this condition,where and which doctor should i consider. I am very much confused. I am getting an appointment in cmc,vellore after 1and 1/2 month which is too far.so i neglected it. And Apollo chennai is very much expensive. Please sir help me guide the best hospital and doctor in south.