Tata Motors — lock unlock problem

when the car getting heat (after running or getting heat by sun ray) its remote system unlock get dissable.not opened by key remote. if opened by manual its give long horn. such type of problem happens only day time. if the car get cool (inner or outer side) then the car opened by key remote. i am facing this problem since four months. i had lodge a complain at local tata moters servicing centre (Maa Samleswari tata Motors, sambalpur, Odisha). but they didnt find the solution.they told me that when you face the problem immediately call us. now i face the same problem but they didnt respond. my car regd no. is OD 15 D 1636, INDIGO,