Hathway — No refund of Security deposit

Address:

Hathway Pallavaram, chennai

While getting new connection from hathway they never mentioned that security deposit is only provided to customers who stay for more than 3 years. Now wen I have deactivated the connection after six months and after returning all the devices. When I ask for security deposit this is what they say "We regret the inconvenience caused.

We are sorry to inform you that as per the process refund of Rs. 400 can be processed only if you’re in the network for more than 3 years. ". Worst behaviour from hathway. Is this the way they handle customers.