Parveen Travels — no ac vent on last seat and engine heat like tandoori stove

Traveling in chn to bangalore bus 10.45 on 31.05.2019. Seat l11 13 14. Last seat no ac vent. Asked and they told they don't have drilling machine and asked me to wait to get cool. It was like sleeping in tandoori stove and not even able to sit here. Called cust care and they told they will check and try to resolve. No action. Still i'm not able to sleep and our family members suffering a lot including my son. Was charged for three tickets and this is the service parveen travels will provide. Worst service. What action will be taken. Whether my money will be refunded back to me for all the inconvenience caused to me and to my family members.