Courtesy Honda — battery of car key

Address:

110009

My car was serviced in last month. I got the battery of my car keys got changed at the same time only.
Its been just a month and the battery of the key is dead again.
Technically i have two keys. And both had new battery in them and both are dead now.
I was charged 500 something rupees for one battery change. Please help me regarding the same.
I want to file a complaint regarding the poor services offered to me. Please replace the bettery of my key. Reply asap.