cancellations – Refunds in case of cancellation of the first stage of Airticket – Lufthansa premium economy

I booked a one-way Premium Economy ticket with Lufthansa on the following route for me and my daughter

March 31 – Bangalore – Frankfurt – Vancouver – Saskatoon

I had booked a return ticket with Lufthansa on the following route for my husband

March 31 – Bangalore – Frankfurt – Vancouver – Saskatoon

May 22 – Saskatoon – Calgary – Frankfurt – Bangalore

On March 18, Lufthansa canceled the first leg (Bangalore – Frankfurt) of the two trips due to the COVID 19 situation. I then went online and canceled the two tickets. I don't know why, but Lufthansa does not clearly state the ticket cancellation policy once you have purchased it. When I look at the terms of Premium Economy tickets sold for the same route in the future, they say "Cancellation – possible refund plus price difference". I really fear that Lufthansa will not refund my tickets. The call center is simply not accessible. Can someone tell me how I can know if my premium economy class tickets were refundable and what are my options if I don't hear them in 4 weeks?