Lufthansa — refund for booking

Respected sir/madam,

I, kevin thomas philip, have concern regarding my booking made on 6th march, 2020 with lufthansa airline (Booking code: mk58ov). My booking was made on round trip :

Bengaluru - munich, munich - amsterdam for 10th may 2020 and

Amsterdam - munich, munich - bengaluru for 12th june 2020.

I paid total of rs. 55, 085 for my booking.

Due to worldwide pandemic, my flights were cancelled by the airlines. Through their website, i cannot access my booking account and it gives contact number not in use. As general information in their website, they provide option to rebook only. I do not want to rebook as my agency in netherlands rejected my reserved seat for studies. I want refund for my booking.
My ticket is non - refundable when i myself cancel the ticket. But here, airline cancelled the ticket without my permission and i am worthy to get a refund.

Please provide me with satisfactory solution for the same. Your kind concern in this matter will be highly appreciated. I enclose my ticket for your reference.

Thanking you,
Yours sincerely,
Kevin.