Factory fitted electric towbar is not releasing after a long time not using

Hi Everyone,

I have a Factory fitted electric Tow bar. Last time I use, it was 5 years ago I believe. I tried to use it Today no chance not releasing.
It has a green light always but whenever I pull it out light changes to red blinking and tow bar is not releasing. I used some wd-40
and rust cleaner but still result didn't' change.

I also tried to pull out the tow bar with bare hand or hit the mechanism with a wood or hammer(kindly), still no chance.

Anyone faced the same issue?