An employer refuses to issue the cancellation papers due to incomplete handover

Dear Sir/Mam,

After serving my 30 days notice in which I had sent multiple emails to the management for the handover and cancellation, I received the first reply from the management on the last day of the notice stating that I need to extend and the visa will be cancelled only if a satisfactory handover is done.

I filed a labour complaint on 16th Feb and got a call from labour on 21st Feb stating that my visa cancellation and settlement will be done by 28th Feb as per the management and the labour complaint was closed.

ON the 24th when I called the company if I need to come to sign the cancellation documents, they informed me that they won't cancel my visa as my handover was not complete!

I have filed a complaint again.

Can handover be the basis of the non-cancellation as I had served my 30 days notice period and whose responsibility is in regards to handover, employee or employer?

Can the legal advisor force the company to cancel my visa or is it mandatory to be transferred to the labour court?